Oracle 1Z0-870 Exam Questions & Answers

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1 Oracle 1Z0-870 Exam Questions & Answers Number: 1Z0-870 Passing Score: 800 Time Limit: 120 min File Version: Oracle 1Z0-870 Exam Questions & Answers Exam Name: MySQL 5.0, 5.1 and 5.5 Certified Associate Exam For Full Set of Questions please visit:

2 Passguide QUESTION 1 Adam works as a Database Administrator for Pass4sure.com. He creates a table named Students. He wants to create a new table named Class with the help of the Students table. Which of the following syntaxes will Adam use to accomplish the task? A. CREATE TABLE Class INSERT INTO SELECT * FROM Students; B. CREATE TABLE Class FROM SELECT * FROM Students; C. CREATE TABLE Class (SELECT * FROM Students); D. CREATE TABLE Class AS SELECT * FROM Students; QUESTION 2 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created two tables named Employees and Departments in the database. Now, you want to display data from both tables. Which of the following actions will you perform to accomplish the task? A. Join B. Table Merge operator C. HAVING D. GROUP BY QUESTION 3 Which of the following terms is described in the statement below? "It is procedural code that is automatically executed in response to certain events on a particular table or view in a database." A. Data type B. Table C. Datetime data type D. Database trigger

3 QUESTION 4 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database development platform. You have created a table named Employees in the database. You want to display the names of the employees whose salary is more than $5000, but you do not want to display any duplicate content. Therefore, you have written the following query: SELECT emp_id, DISTINCT emp_name WHERE salary > 5000 FROM Employees; Which of the following statements is true about the above query? A. The statement will display only unique names whose salary is more than $5000. B. The UNIQUE clause should be used in place of the DISTINCT clause. C. The statement will give an error. D. The statement will display those records whose salary is more than $5000. Correct Answer: C QUESTION 5 Fill in the blank with the appropriate word. The data type defines a date that is combined with a time of day along with fractional seconds that is based on a 24-hour clock. A. datetime QUESTION 6 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as the database platform. You have created a table named Students in the database. The structure of the table is as follows:

4 Stu_ID NUMBER (3) PRIMARY KEY Stu_Name VARCHAR2 (25) NOT NULL Fee NUMBER (8, 2) Class NUMBER (5); You have executed the following statement for the table "Students": SELECT e.stu_name, m.fee FROM Students e, Students m WHERE e.stu_id = m.stu_id; Which of the following join types have you used in the above statement? A. Cross join B. Equijoin C. Self join D. Outer join Correct Answer: C QUESTION 7 Fill in the blank with the appropriate word. A specifies that the value of a column (or columns), upon which the index is based, must be unique. A. unique index QUESTION 8 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a new table named Employees, which keeps all the information of the employees. You want to add a new row to the Employees table. Which of the following statements will you use to accomplish the task? A. INSERT (column1, column2,...columnn) INTO <table_name> VALUES(value1, value2,...v aluen); B. INSERT INTO <table_name>(column1, column2,...columnn) VALUES(value1,value2,...va luen); C. INSERT <table_name>(column1, column2,...columnn), VALUES(value1, value2,...valuen ); D. INSERT INTO <table_name>(column1, column2,... columnn), VALUES(value1, value2,...v aluen);

5 Correct Answer: B QUESTION 9 Fill in the blank with the appropriate term. A provides a concise and flexible means for matching strings of text, such as particular characters, words, or patterns of characters. A. regular expression QUESTION 10 Which of the following are true about UPDATE statements? Each correct answer represents a complete solution. Choose all that apply. A. You can use the WHERE clause to have your update affects a specific set of rows. B. You use the SET clause to update multiple columns of a table separated by commas. C. You can use co-related sub query in UPDATE statements to update data from other tables. D. If you don't use the WHERE clause then the UPDATE will not update any rows in the table. BC QUESTION 11 DRAG DROP Drag and drop the correct constraint types to their corresponding specifications.

6 A. Answer: Correct Answer: QUESTION 12 Which of the following statements is correct for equijoin used to join two tables named Employees and Department? A. SELECT Dept_Name, Emp_Name FROM Departments d1, Employees e1 ORDER BY Dept_Name, Emp_Name; B. SELECT D.Dept_Name, E.Emp_Name FROM Departments d1, Employees e1 HAVING Dept_Name, Emp_Name; C. SELECT E.Emp_Name, D.Dept_Name FROM Departments d1, Employees e1 WHERE Dept_No = Dept_No

7 ORDER BY Dept_Name, Emp_Name; D. SELECT Dept_Name, Emp_Name FROM Departments d1, Employees e1 WHERE d1.dept_no = e1.dept_no ORDER BY Dept_Name, Emp_Name; QUESTION 13 Which of the following properties of concurrency control refers to the requirement that other operations cannot access or see the data in an intermediate state during the execution of a transaction? A. Consistency B. Durability C. Atomicity D. Isolation QUESTION 14 Which of the following are the types of numeric literals that can be used in arithmetic expressions? Each correct answer represents a complete solution. Choose all that apply. A. Numeric B. Integer C. Binary D. Real Correct Answer: BD QUESTION 15 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have written two statements, which are as follows: 1. SELECT DISTINCT OBJECT_TYPE FROM USER_OBJECTS;

8 2. SELECT OBJECT_TYPE FROM ALL_OBJECTS; Which of the following options explains the difference between the results of these two statements? Each correct answer represents a complete solution. Choose all that apply. A. The first statement will display distinct object types that can be accessed by the user. B. The second statement will display all object types that a user can access. C. The first statement will display distinct object types owned by a user. D. The second statement will display all object types owned by a user. Correct Answer: BC QUESTION 16 Which of the following will be true about a table column if you plan to create an index on that column? Each correct answer represents a complete solution. Choose all that apply. A. The column is often used in the WHERE clause of SQL statements. B. The column contains very small number of NULL values. C. The table is updated frequently. D. The column should contain a wide range of values. D QUESTION 17 Consider the exhibit given below: Which of the following queries will return the name of the customer who placed the highest amount of orders and the total order amount? A. SELECT CUSTOMER, MAX(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS GROUP BY CUSTOMER

9 / B. SELECT CUSTOMER, SUM(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS WHERE SUM(UNITPRICE*QUANTITY)= (SELECT MAX(SUM(UNITPRICE*QUANTITY)) FROM ORDERS GROUP BY CUSTOMER) GROUP BY CUSTOMER / C. SELECT CUSTOMER, SUM(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS GROUP BY CUSTOMER HAVING SUM(UNITPRICE*QUANTITY)= (SELECT MAX(SUM(UNITPRICE*QUANTITY)) FROM ORDERS GROUP BY CUSTOMER) / D. SELECT CUSTOMER, SUM(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS GROUP BY CUSTOMER HAVING SUM(UNITPRICE*QUANTITY)= (SELECT SUM(UNITPRICE*QUANTITY) FROM ORDERS GROUP BY CUSTOMER) / Correct Answer: C QUESTION 18 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. You want to create a list of employees working in the organization, but you do not want to display any duplicate row in the report. Which of the following statements will help you to accomplish the task? A. SELECT emp_id, emp_name FROM Employees ORDER BY emp_id; B. SELECT emp_id, emp_name FROM Employees; C. SELECT DISTINCT emp_id, emp_name FROM Employees; D. SELECT emp_id, emp_name FROM Employees GROUP BY emp_id; Correct Answer: C QUESTION 19 Adam works as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. Adam has created a table named Employees in the database. He wants to retrieve the information of those employees who have at least one person reporting to them. Which of the following queries will Adam execute to accomplish the task?

10 A. SELECT employee_id, last_name, job_id, department_id FROM Employees WHERE employee_id EXISTS (SELECT manager_id WHERE manager_id is NULL); B. SELECT employee_id, last_name, job_id, department_id FROM Employees HAVING employee_id IN (SELECT manager_id FROM Employees WHERE manager_id is NOT NULL); C. SELECT employee_id, last_name, job_id, department_id FROM Employees outer WHERE EXISTS (SELECT 'x' FROM Employees WHERE manager_id = outer.employee_id); D. SELECT employee_id, last_name, job_id, department_id FROM Employees WHERE employee_id IN (SELECT manager_id WHERE manager_id is NOT NULL); Correct Answer: C QUESTION 20 You work as a Database Administrator for Pass4sure.com. The company uses the MySQL database. You have created a new table named Employees in the database and performed update operation but you got an error because of the last transaction. Now, you want to terminate the last transaction. Which of the following commands can you use to accomplish the task? Each correct answer represents a complete solution. Choose all that apply. A. ROLLBACK B. REMOVE C. DELETE D. COMMIT D QUESTION 21 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. The database contains a table named Employees. You want to remove an index named Emp_name_idx from the Employees table. Which of the following statements should you use to accomplish the task? A. DELETE INDEX Emp_name_idx; B. CANCEL INDEX Emp_name_idx; C. REMOVE INDEX Emp_name_idx; D. DROP INDEX Emp_name_idx;

11 QUESTION 22 Which of the following statements will delete all the records from the table T1? Each correct answer represents a complete solution. Choose all that apply. A. TRUNCATE TABLE T1; B. DELETE FROM T1; C. DELETE * FROM T1; D. DELETE T1; BD QUESTION 23 You work as a Database Administrator for Pass4sure.com. The company uses the MySQL database. You have created a table named Employees. The table contains the following structure. The company has three departments. A task has been assigned to you to calculate the sum of the average length of employees' last name per department. Which of the following queries will you execute to accomplish the task? A. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees HAVING department_id; B. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees GROUP BY department_id; C. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees WHERE department_id=not NU LL; D. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees ORDER BY department_id; Correct Answer: B QUESTION 24 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You want to use group functions, so you have decided to put an alias of group functions as 'GP'. Which of the following are the correct ways to use group functions? Each correct answer represents a complete solution. Choose all that apply.

12 A. GP1(GP2(GPn(group_item))) = result B. GP1(GP2(group_item)) = result C. GP1(GP2(GP3(group_item))) = result D. GP1(group_item) = result Correct Answer: BD QUESTION 25 Adam works as a Database Administrator for Pass4sure.com. Adam has created a table named Students. In this table, Adam wants to create a column to store the fees of students. Which of the following data types will Adam use to accomplish the task? Each correct answer represents a complete solution. Choose all that apply. A. NUMBER B. NUMBER(p,s) C. DEFAULT D. BLOB B QUESTION 26 Review the following ER diagram:

13 Which of the following SQL statements will return all rows for a given CUST_ID and PROD_ID where sales of specific products on a given day are greater than 10? Additionally the list should be ordered by CUST_LAST_NAME, CUST_FIRST_NAME and PROD_NAME. A. SELECT a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id FROM customers a, products b, times c, sales e WHERE a.cust_id=e.cust_id AND b.prod_id=e.prod_id AND c.time_id=e.time_id B. GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id HAVING COUNT(*) > 10 ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id; C. SELECT a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*) FROM customers a, products b, times c, sales e WHERE a.cust_id=e.cust_id AND b.prod_id=e.prod_id AND c.time_id=e.time_id GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id HAVING COUNT(*) > 10; D. SELECT a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*) FROM customers a, products b, times c, sales e WHERE a.cust_id=e.cust_id AND b.prod_id=e.prod_id AND c.time_id=e.time_id GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id HAVING COUNT(*) > 10 ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id;

14 E. SELECT a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*) TOTAL FROM customers a, products b, times c, sales e WHERE a.cust_id=e.cust_id AND b.prod_id=e.prod_id AND c.time_id=e.time_id GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id; F. SELECT a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*) TOTAL FROM customers a, products b, times c, sales e WHERE a.cust_id=e.cust_id AND b.prod_id=e.prod_id AND c.time_id=e.time_id AND total > 10 GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id; Correct Answer: C QUESTION 27 Speed Inc. is a courier company. It delivers letters, parcels, and other items to their desired destination. The company wants to create a database that keeps the records of items received, items delivered, and also the information about any undelivered item. A table named Courierdetail has the following attributes: CustomerName Address ContactNumber DateOfReceiving DeliveryAcknowledgement Which of the above-mentioned attributes can be designated as the primary key? A. CustomerName B. None of the attributes can be designated as the primary key. C. Address D. ContactNumber Correct Answer: B QUESTION 28 Considering the exhibit given below: SQL> INSERT INTO T1 VALUES (10,'JOHN');

15 1 row created SQL> INSERT INTO T1 VALUES (12,'SAM'); 1 row created SQL> INSERT INTO T1 VALUES (15,'ADAM'); 1 row created SQL> SAVEPOINT A; Savepoint created SQL> UPDATE T1 2 SET NAME='SCOTT' 3 WHERE CUST_NBR=12; 1 row updated SQL> SAVEPOINT B; Savepoint created SQL> DELETE FROM T1 WHERE NAME LIKE '%A%'; 1 row deleted SQL> GRANT SELECT ON T1 TO BLAKE; Grant succeeded SQL> ROLLBACK; Rollback complete What will be the output of SELECT * FROM T1;? A. CUST_NBR NAME JOHN B. CUST_NBR NAME JOHN 12 SCOTT 15 ADAM C. CUST_NBR NAME JOHN 15 ADAM D. CUST_NBR NAME JOHN 12 SCOTT

16 QUESTION 29 Which of the following provides reliable units of work that allow correct recovery from failures and keeps a database consistent even in cases of system failure? A. Database security B. Two-phase commit C. Concurrency control D. Database transaction QUESTION 30 Which of the following functions can be performed by a view? Each correct answer represents a complete solution. Choose all that apply. A. Restrict a user to specific columns in a table. B. Contain a sub query in the FROM clause. C. Join columns from multiple tables, so that they look like a single table. D. Restrict a user to specific rows in a table. CD QUESTION 31 Mark works as a Database Administrator for Neon Inc. He issues the following query to insert rows in a table named Emp: SELECT * FROM Emp SET AUTOCOMMIT=0 INSERT INTO Emp VALUES('XXX','John',04/02/1977) INSERT INTO Emp VALUES('YYY','Richard',03/01/1977) ROLLBACK How many rows will be inserted in the Emp table after the ROLLBACK statement has been issued?

17 A. Both rows will be inserted. B. No rows will be inserted. C. Only the second row will be inserted. D. Only the first row will be inserted. Correct Answer: B QUESTION 32 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. The table contains the following information: You want to display information about employees in the following format: First_Name, Last_Name, City Which of the following statements will you use to accomplish the task? A. SELECT CONCAT('First_Name' CONCAT(' Last_Name', 'City')) FROM Employees; B. SELECT CONCAT('First_Name' Last_Name' 'City')) FROM Employees; C. SELECT CONCAT('First_Name', ' Last_Name', 'City')) FROM Employees; D. SELECT CONCAT('First_Name', CONCAT(' Last_Name', 'City')) FROM Employees; QUESTION 33 You work as a Database Administrator for Pass4sure.com. You have created a table named Students in a database. You want to add a PRIMARY KEY constraint to the Student_ID column of the Students table. Which of the following statements will you use to accomplish the task? A. UPDATE TABLE Students ADD CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); B. ADD CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); C. ALTER TABLE Students ADD CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID);

18 D. MODIFY CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); Correct Answer: C QUESTION 34 You work as a Database Administrator for Pass4sure.com. You have created a new table named Employee. Now, you want to create a view employee_view for this table. The view will contain the emp_id, emp_name, emp_desig, salary, and emp_dept of those employees whose salary is greater than $ You do not want to make changes to the column values through the view. Which of the following syntaxes will you use to accomplish the task? A. CREATE VIEW employee_view AS SELECT emp_id, emp_name, emp_desig, emp_dept FROM Employee HAVING salary > WITH READ ONLY; B. CREATE VIEW employee_view AS SELECT emp_id, emp_name, emp_desig, emp_dept FROM Employee WHERE salary > WITH CHECK OPTION CONSTRAINT; C. CREATE VIEW employee_view AS SELECT emp_id, emp_name, emp_desig, emp_dept FROM Employee WHERE salary > WITH READ ONLY; D. CREATE VIEW employee_view AS SELECT emp_id, emp_name, emp_desig, emp_dept FROM Employee ORDER BY salary > WITH READ ONLY; Correct Answer: C QUESTION 35 Which of the following prevent DML operations like INSERT, UPDATE and DELETE on a view? Each correct answer represents a complete solution. Choose all that apply. A. The use of the GROUP BY clause. B. The use of the DISTINCT keyword. C. The use of the SQL Group Functions. D. The use of the ROWNUM pseudo column.

19 BCD QUESTION 36 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. The table has the following data. Now, you want to remove the records of those persons whose last Name is 'Smith' and first name is 'Jack' from the Employees table. Which of the following statements will you use to accomplish the task? A. REMOVE Last_Name= 'Smith' AND First_Name='Jack' FROM Employees B. DELETE Last_Name= 'Smith' AND First_Name='Jack' FROM Employees C. REMOVE FROM Employees WHERE Last_Name= 'Smith' AND First_Name='Jack' D. DELETE FROM Employees WHERE Last_Name= 'Smith' AND First_Name='Jack' QUESTION 37 Review the following ER diagram:

20 Which of the following queries will properly display the average unit_cost (rounded to two decimal places) for a given product on a Saturday and Order the results by the PROD_NAME column? A. SELECT a.prod_name, AVG(b.unit_cost) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday' GROUP BY a.prod_name ORDER BY a.prod_name; B. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday' GROUP BY a.prod_name ORDER BY a.prod_name; C. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday'; D. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday' ORDER BY a.prod_name; E. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday' GROUP BY a.prod_name ORDER BY ROUND(AVG(b.unit_cost),2);

21 Correct Answer: B QUESTION 38 Which of the following SQL functions may require the use of a GROUP BY clause in a SELECT statement? Each correct answer represents a complete solution. Choose all that apply. A. AVG B. TO_NUMBER C. LOWER D. SUM E. TO_CHAR D QUESTION 39 You work as a Database Administrator for Pass4sure.com. You create a database that has a table named Students. The table is used for storing the records of students. Due to security reasons, you want to permanently remove all data from the table without removing the table structure. Which of the following will you use to accomplish the task? Each correct answer represents a complete solution. Choose all that apply. A. REMOVE TABLE FROM Students; B. DROP TABLE FROM Students; C. TRUNCATE TABLE Students; D. DELETE FROM Students; Correct Answer: CD QUESTION 40 Which of the following clauses is used with the CREATE VIEW statement? A. ORDER BY B. WITH CHECK OPTION

22 C. GROUP BY D. WHERE Correct Answer: B QUESTION 41 Which of the following clauses is used with the CREATE VIEW statement? A. ORDER BY B. GROUP BY C. WITH CHECK OPTION D. WHERE Correct Answer: C QUESTION 42 You work as a Database Administrator for Realtech Inc. A database has a table named Product. The auto commit mode of the database is turned off. You want to perform an update on the Product table. Which of the following queries will permanently save the changed value of ProductID in the table? 1. UPDATE Product SET COST=49.90 WHERE ProductID='121' 2. UPDATE Product SET COST=49.90 WHERE ProductID='121' COMMIT A. Only Query 1 will save the changes permanently. B. Both the queries will successfully change the value, but only Query 1 will permanently store the value in the database. C. Both the queries will successfully change the value of ProductID='121'. D. Both the queries will successfully change the value, but only Query 2 will permanently store the value in the database.

23 QUESTION 43 You work as a Database Administrator for Pass4sure.com. You have written the following code for creating a view: CREATE VIEW Student_View AS SELECT Stu_ID, Stu_Description FROM Students WHERE Stu_ID = 512 ORDERED BY Stu_Description; After executing the above code, you got an error. Which of the following statements is incorrect in the view? A. ORDERED BY Stu_Description; B. WHERE Stu_ID = 512 C. CREATE VIEW Student_View D. AS SELECT Stu_ID, Stu_Description QUESTION 44 Which of the following statements is true about the GROUP BY clause? A. It returns a single row of information for each group of rows. B. It guarantees the order of the result set. C. It encourages duplicate rows for the grouping column(s). D. It automatically sorts the grouped result in descending order. QUESTION 45 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. The structure of the table is as follows:

24 Now, you want to rename the Emp_join_date column to Joining_date. Which of the following statements is true according to the scenario? A. The column can be renamed by using the UPDATE statement. B. The column can be renamed by using the ALTER TABLE statement. C. The column can be renamed by using the TRUNCATE statement. D. The column can be renamed by using the RENAME statement. Correct Answer: B QUESTION 46 Which of the following statements will a user use to display a database in MySQL? A. DISPLAY DATABASES; B. SELECT * FROM DATABASES; C. SHOW DATABASE; D. VIEW DATABASES; Correct Answer: C QUESTION 47 What kind of join automatically joins two or more tables based on common column names? A. Self Join B. Inner Join C. Natural Join D. Equi-join Correct Answer: C

25 QUESTION 48 You are designing a database application for a telephone company. The company wants to provide online billing enquiry to its customers. Each customer has a unique Login and Password, which he/she will enter to log on to the site. After logging in, a customer will be allowed to view only his/her bill. Which of the following actions will you perform during application development? A. Create an integrity constraint B. Create an index C. Create a view D. Create a stored procedure QUESTION 49 All of the following statements are true about a unique index except for which one? A. It must be unique for all columns of a table. B. It should not be explicitly defined for tables. C. It must be created only for columns having PRIMARY KEY or UNIQUE constraints. D. It cannot be created by itself. E. It cannot be ensured that the combination of all values contained in the index is unique. Correct Answer: E QUESTION 50 Which of the following is required to manage multiple users accessing the same groups of resources with the least possible overhead, either optimized for a specific task, or for general purpose? A. Database transaction B. Two-phase commit C. Concurrency control D. Authentication Correct Answer: C

26 QUESTION 51 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database development platform. You have created a table named Employees in the database and you perform the UPDATE operation to update the rows of all employees whose salary is greater than$5,000. Due to some unavoidable circumstances, you have to undo the last transaction. Which of the following commands should you use to accomplish the task? A. ROLLBACK B. DELETE C. UNDO D. COMMIT QUESTION 52 Which of the following syntaxes will a user use to remove a database in MySQL? A. CANCEL DATABASE [IF EXISTS] database_name; B. REMOVE DATABASE [IF EXISTS] database_name; C. DELETE DATABASE [IF EXISTS] database_name; D. DROP DATABASE [IF EXISTS] database_name; QUESTION 53 Which of the following statements are true about group functions? Each correct answer represents a complete solution. Choose all that apply. A. Group functions return a single result based on a number of rows as opposed to the single row functions. B. Different group functions are AVG, COUNT, MAX, MIN, STDDEV, SUM, and VARIANCE. C. All group functions except the COUNT (*) and GROUPING functions ignore NULL values. D. The NVL function forces group functions to include duplicate values. BC

27 QUESTION 54 Which of the following comprises a unit of work performed within a database management system against a database, and treated in a coherent and reliable way independent of other transactions? A. ORDER BY B. HAVING C. GROUP BY D. Database transaction QUESTION 55 DRAG DROP Drag and drop the correct ACID properties to their corresponding specifications. A. Answer:

28 Correct Answer: QUESTION 56 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. Now, you want to display information about indexes in the Employees table. Which of the following commands will you use to accomplish the task? A. % mysqlshow --keys db_name table_name B. % mysqlshow --status db_name table_name C. % mysqlshow --status table_name D. % mysqlshow db_name table_name QUESTION 57 You work as a Database Administrator for Pass4sure.com. The management instructs you to check the transaction in DBMS to guarantee that either all of the tasks of a transaction are performed or none of them are. Which of the following properties will you use to accomplish the task? A. Durability B. Consistency

29 C. Atomicity D. Isolation Correct Answer: C QUESTION 58 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees. You want to insert a row in the table. The structure of the table is as follows: Emp_ID NUMBER PRIMARY KEY Emp_Name VARCHAR2 (30) Emp_Address VARCHAR2 (40) Which of the following statements can you use to accomplish the task? Each correct answer represents a complete solution. Choose all that apply. A. INSERT INTO Employees VALUES (100, 'Adam', 'California'); B. INSERT INTO Employees ('Adam', 'California'); C. INSERT INTO Employees (Emp_Name, Emp_Address) VALUES ('Adam', 'California'); D. INSERT INTO Employees (Emp_ID, Emp_Name, Emp_Address) VALUES (100, 'Adam', 'California'); D QUESTION 59 Which of the following update statements will change the salary and job title of employee Scott to that of Adams? Each correct answer represents a complete solution. Choose all that apply. A. UPDATE EMP SET (SAL,JOB)=(SELECT SAL,JOB FROM EMP WHERE ENAME='SCOTT') WHERE ENAME='ADAMS'; B. UPDATE EMP SET SAL=(SELECT SAL FROM EMP WHERE ENAME='ADAMS'), JOB=(SELECT JOB FROM EMP WHERE ENAME='ADAMS') WHERE ENAME='SCOTT'; C. UPDATE EMP SET JOB=(SELECT JOB FROM EMP WHERE ENAME='ADAMS'), SAL=(SELECT SAL FROM EMP WHERE ENAME='ADAMS') WHERE ENAME='SCOTT'; D. UPDATE EMP SET (SAL,JOB)=(SELECT SAL,JOB FROM EMP WHERE ENAME='ADAMS') WHERE ENAME='SCOTT';

30 Correct Answer: BCD QUESTION 60 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees and want to retrieve the days of the week on which more than 7 members were hired, as well as the exact number of employees hired on those days. Which of the following queries will you execute to accomplish the task? A. SELECT TO_CHAR(Emp_hire_date, 'day') Emp_hire_day, COUNT(*) FROM EMPLOYEES GROUP BY TO_CHAR(Emp_hire_date, 'day') ORDER BY COUNT(*) >7; B. SELECT TO_CHAR(Emp_hire_date, 'day') Emp_hire_day, COUNT(*) FROM EMPLOYEES GROUP BY TO_CHAR(Emp_hire_date, 'day') HAVING COUNT(*) >7; C. SELECT TO_CHAR(Emp_hire_date, 'day') Emp_hire_day, COUNT(*) FROM EMPLOYEES GROUP BY TO_CHAR(Emp_hire_date, 'day') & COUNT(*) >7; D. SELECT TO_CHAR(Emp_hire_date, 'day') Emp_hire_day, COUNT(*) FROM EMPLOYEES GROUP BY TO_CHAR(Emp_hire_date, 'day') WHERE COUNT(*) >7; Correct Answer: B QUESTION 61 Which of the following operators is used to check if the field values are included in a specified comma-delimited list? A. LIKE B. OR C. BETWEEN D. IN QUESTION 62 Which of the following methods is used to search a string based on a regular expression?

31 A. match() B. discover() C. find() D. seek() QUESTION 63 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have written the following MySQL statement to calculate the salary of employees: SELECT (5000+((base_salary*5.0)/100)) FROM Employees; What will happen if you remove the parentheses from the statement? A. The output will be more than the desired output. B. A syntax error will occur. C. The output will be less than the desired output. D. The same value will be displayed. QUESTION 64 Which of the following is the correct syntax for the DESCRIBE command? A. DESC[RIBE] {[schema.] table_name} B. DESC[RIBE] {[schema.entity] WHERE [@net_service_name]} C. DESC[RIBE] {[schema.] Object. table_name} D. DESC[RIBE] {[schema.] Object [@net_service_name]} QUESTION 65 Which of the following statements can be used to outer-join a table to itself? A. SELECT E1.EMPLOYEE_ID, E1.MANAGER_ID, E2.EMPLOYEE_ID FROM EMPLOYEES E1, EMPLOYEES E2 WHERE E1.MANAGER_ID(+) = E2.EMPLOYEE_ID;

32 B. SELECT EMPLOYEE_ID, MANAGER_ID FROM EMPLOYEES WHERE MANAGER_ID = (+) EMPLOYEES.EMPLOYEE_ID; C. SELECT EMPLOYEE_ID, MANAGER_ID FROM EMPLOYEES (+) WHERE EMPLOYEES.MANAGER_ID = EMPLOYEES.EMPLOYEE_ID; D. SELECT EMPLOYEE_ID, MANAGER_ID FROM EMPLOYEES WHERE EMPLOYEES.MANAGER_ID(+) = EMPLOYEES.EMPLOYEE_ID; QUESTION 66 Oliver works as a Database Administrator for ADO Inc. He manages the database of the company. The database has a table named Product. He wants to perform some delete operations on the table. He issues the following SQL query: SAVEPOINT NP1 DELETE FROM Product WHERE ProductID='112' SAVEPOINT NP2 DELETE FROM Product WHERE ProductID='90' SAVEPOINT NP3 DELETE FROM Product WHERE ProductID='113' After three deletions, he changes his mind and issues the following command: ROLLBACK to NP2 What affect will this command have on the database? A. It will delete the records having ProductID as 112 and 113. B. It will delete the record where ProductID is 112. C. All the changes will be reverted, i.e. no records will be deleted from the table. D. It will delete the record where ProductID is 90. Correct Answer: B QUESTION 67 Which of the following data types can be used in MySQL? Each correct answer represents a complete solution. Choose all that apply.

33 A. Date and Time B. Function C. Numeric D. String CD QUESTION 68 If you want to create a simple database view on which other privileged users should not be able to perform DML operations, then which of the following options will you choose? Each correct answer represents a complete solution. Choose all that apply. A. Create the view as a Complex View. B. Grant only SELECT access on the view to users. C. Create the view with the WITH READ ONLY option. D. Create the view with the WITH CHECK OPTION option. Correct Answer: BC QUESTION 69 You work as a Database Administrator for Pass4sure.com. You have created a view named student_view from the Student table. You want to retrieve data from the view. Which of the following statements will you use to accomplish the task? A. SELECT FROM student_view B. SELECT * FROM Student WHERE VIEW_NAME ='student_view' C. SELECT * FROM student_view D. SELECT * FROM VIEW WHERE VIEW_NAME = 'student_view' Correct Answer: C QUESTION 70 Fill in the blank with the appropriate word. are important for database integrity, because they mean that the database can be restored to a clean copy even after erroneous operations are performed.

34 A. Rollbacks QUESTION 71 Fill in the blank with the appropriate word. A is a named group of privileges such as object, system, and role privileges, which can be granted to a user or to another role. A. role QUESTION 72 Which of the following functions may require the use of the GROUP BY clause? Each correct answer represents a complete solution. Choose all that apply. A. SUBSTR B. LOWER C. AVG D. COUNT E. SUM Correct Answer: CDE QUESTION 73 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database development platform. You have created a table named Employees in the database. You are assigned the task to create a report that will contain the first name of employees who are working as Marketing Managers for the organization. The structure of the table is as follows:

35 Which of the following statements will you use to accomplish the task? A. SELECT First_name FROM Employees WHERE Desig_id = 'Mar_man'; B. SELECT First_name FROM Employees WHERE Desig_id = Mar_Man; C. SELECT First_name FROM Employees HAVING Desig_id = 'Mar_Man'; D. SELECT First_name FROM Employees WHERE Desig_id = 'Mar_Man'; QUESTION 74 You work as a Database Administrator for Pass4sure.com. You have created a table named Employees and an index named emp_index. You find that the index is not working properly and thus you want to remove it. Which of the following statements will you use to accomplish the task? A. REMOVE INDEX emp_index B. DELETE INDEX emp_index C. CANCEL INDEX emp_index D. DROP INDEX emp_index QUESTION 75 You work as a Database Administrator for Pass4sure.com. You have created a new table named Students. You want to create a foreign key constraint on the student_id in the Students table. Which of the following statements will you follow to accomplish the task? A. Use the MODIFY TABLE command with the ADD clause on the Students table. B. Use the ALTER TABLE command with the ADD clause on the Students table. C. Use the UPDATE TABLE command with the ADD clause on the Students table. D. Use the CHANGE TABLE command with the ADD clause on the Students table. Correct Answer: B

36 QUESTION 76 Fill in the blank with the appropriate word. An is a combination of values, variables, operators, and functions that are interpreted according to some particular rules of precedence and of association for a particular programming language, which first computes and then produces another value. A. expression QUESTION 77 Relational Database Management System supports a mechanism known as concurrency control and locking for sharing of data. Which of the following are achieved through concurrency control and locking? Each correct answer represents a complete solution. Choose three. A. Consistency B. Isolation C. Referential Integrity D. Atomicity BD QUESTION 78 Samuel designs a database for a production company. He creates a table as follows: CREATE TABLE Product (Product_No number(10) CONSTRAINT Prod_Product_No_pk PRIMARY KEY, Product_ID number(10) CONSTRAINT prod_product_id_nk NOT NULL); For which column of the table will an index be created? A. No index will be created. B. An index will be created for the Product_ID column. C. An index will be created for the Product_No column. D. A unique index will be created for the Product_ID column.

37 Correct Answer: C QUESTION 79 Which of the following conditions is true if you are using the DROP TABLE command to delete a table? A. Only data from the table will be deleted, not the table structure. B. The structure of the table will not be deleted if there is data in it. C. The structure of the table and all the data from the table will be deleted, but can be rolled back and restored. D. The structure of the table and all the data in the table will be deleted, and cannot be rolled back and restored. QUESTION 80 Which of the following statements are true about a view? Each correct answer represents a complete solution. Choose all that apply. A. A sub query that is used in a complex view definition cannot contain joins or group functions. B. The OR REPLACE option is used to change the definition of an existing view without dropping and recreating it. C. The WITH CHECK OPTION constraint can be used in a view definition to restrict the columns displayed through the view. D. A view can be dropped and then re-created. Correct Answer: BD QUESTION 81 You work as a Database Administrator for Pass4sure.com. You have written the following statement: SELECT 'Student Name:' Stud_Name FROM Students WHERE Stud_ID = 50; Which of the following will be treated as a number literal in the SELECT statement? A. 50

38 B. Stud_ID C. Student Name D. QUESTION 82 Adam works as a Database Administrator for Pass4sure.com. He creates a table named Students. The structure of the Students table is as follows: CREATE TABLE Students ( Stud_ID NUMBER(3) NOT NULL, Stud_Name VARCHAR2(25) NOT NULL, Stud_Phone VARCHAR2(9) NOT NULL, Stud_Address VARCHAR2(50)); Adam wants to restrict the values in the Stud_Phone column to numeric. Which of the following statements are true if Adam wants to modify the structure of the Students table so that the data type of the Stud_Phone column changes from VARCHAR2 to NUMBER? Each correct answer represents a complete solution. Choose two. A. Adam cannot modify the data type of the column if there is data in the column. B. Adam can modify the data type of the column by using the UPDATE command. C. Adam cannot modify the data type of the column but can increase the length of the column even if there is data in the column. D. Adam can modify the data type of the column by using the CHANGE command. C QUESTION 83 Which of the following statements are true about a table name? Each correct answer represents a complete solution. Choose all that apply. A. It can contain only three special characters: the dollar sign ($), the underscore (_), and the pound sign (#). B. It must begin with an alphanumeric character and may contain a digit. C. It should be unique, meaningful, and descriptive. D. It can be up to 45 characters long. BC

39 QUESTION 84 Which of the following are true about DELETE and TRUNCATE statements? Each correct answer represents a complete solution. Choose all that apply. A. TRUNCATE can drop the storage being used by the table. B. DELETE statements require a COMMIT to confirm the DELETE. C. DELETE should be used when a conditional delete is to be performed. D. TRUNCATE is better if all the rows are to be deleted from a table. BCD QUESTION 85 For which of the following database objects can you create a synonym? Each correct answer represents a complete solution. Choose all that apply. A. Views B. Sequences C. User defined object types D. Another synonym BCD QUESTION 86 Consider the following exhibit: SQL> DESC Employee

40 SQL> SELECT * FROM Employee; 14 rows selected The Employee table has 14 rows. You want to retrieve the names of all employees and their managers. Therefore, you issued the following query: SELECT e.ename, m.ename FROM employee e INNER JOIN employee m ON e.manager_id = m.employee_id; How many records will the above query retrieve? A. 14 B. 1 C. 13 D. 0

41 Correct Answer: C QUESTION 87 You want to display records from two tables without validating whether the records match or not. Which of the following types of join will you use? A. MERGE JOIN B. OUTER JOIN C. CROSS JOIN D. FULL OUTER JOIN QUESTION 88 Review the following table descriptions: SQL> desc products SQL> desc sales SQL> desc customers

42 Which of the following SQL statements would correctly return the sum of all sales (QUANTITY_SOLD and AMOUNT_SOLD) for all products that contain the words 'Martial Arts' (PROD_NAME column) and all customers with a last name (CUST_LAST_NAME column) that contains the string 'Die'? A. SELECT a.cust_id, a.cust_last_name, SUM(c.quantity_sold), SUM(c.amount_sold) FROM customers a, sales c WHERE a.cust_id=c.cust_id AND c.prod_id IN (SELECT prod_id FROM products z WHERE UPPER(z.prod_name) LIKE 'MARTIAL ARTS%') AND UPPER(a.cust_last_name) LIKE 'DIE%'; B. SELECT a.cust_id, a.cust_last_name, SUM(c.quantity_sold), SUM(c.amount_sold) FROM customers a, sales c WHERE a.cust_id=c.cust_id AND c.prod_id IN (SELECT prod_id FROM products z WHERE UPPER(z.prod_name) LIKE 'MARTIAL ARTS%') AND UPPER(a.cust_last_name) LIKE 'DIE%' GROUP BY a.cust_id, a.cust_last_name; C. SELECT a.cust_id, a.cust_last_name, c.quantity_sold, c.amount_sold FROM customers a, sales c WHERE c.prod_id=b.prod_id AND a.cust_id=c.cust_id AND UPPER(products.prod_name) LIKE 'MARTIAL ARTS%' AND UPPER(a.cust_last_name) LIKE 'DIE%'; D. SELECT a.cust_id, a.cust_last_name, sum(c.quantity_sold), sum(c.amount_sold) FROM customers a, sales c WHERE a.cust_id=c.cust_id AND c.prod_id IN (select prod_id FROM products z WHERE UPPER(z.prod_name) LIKE 'MARTIAL ARTS') AND UPPER(a.cust_last_name) LIKE 'DIE' GROUP BY a.cust_id, a.cust_last_name; Correct Answer: B QUESTION 89 Fill in the blank with the appropriate term. The clause groups selected rows on the basis of values of specified column(s) for each row, and returns a single row of summary information for each group. A. GROUP BY

43 QUESTION 90 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database development platform. You have created a table named Employees in the database. You want to insert a row in the table. To accomplish the task, you have written an INSERT statement. Which of the following options will be followed by the input data in the INSERT statement? A. INTO B. INSERT C. VALUES D. TABLE QUESTION 91 Which type of join contains a join condition that uses an equality operator to process the join condition? A. Non Equijoin B. Cartesian product C. Equijoin D. Self join Correct Answer: C QUESTION 92 Fill in the blank with the appropriate word. An is a data structure that improves the performance of queries issued against a table. A. index

44 QUESTION 93 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as the database development platform. You have created a database named Employee. Which of the following statements will prevent you from getting error messages if a database with the given name already exists on the database server? A. CREATE DATABASE NOT EXISTS Employee; B. CREATE DATABASE NONAME EXISTS Employee; C. CREATE DATABASE IF NONAME EXISTS Employee; D. CREATE DATABASE IF NOT EXISTS Employee; QUESTION 94 You work as a Database Administrator for Pass4sure.com. You have created a table named Students in the database. Following are the data contained in this table: You have written the following query to retrieve records from the Students table: SELECT Stu_ID, Last_Name, SUM(Fees) FROM Students WHERE Fees < 3000 GROUP BY Class ORDER BY Last_Name; You get an error on executing the query. Which of the following is the cause of the error? A. ORDER BY Last_Name B. WHERE Fees < 3000

45 C. GROUP BY Class D. FROM Students Correct Answer: C QUESTION 95 You work as a Database Designer for RealTech Inc. You have to design the database of a bank. The database has two tables: Employee and Department. The Employee table has the following attributes: l EmpID (PK) l DeptID (FK) l Name l DateOfBirth l Designation The Department table has the following attributes: l DeptID (PK) l DepartmentName DeptID is the primary key (PK) of the Department table, whereas, after migration, in the above Employee table, it is the foreign key (FK). What does migration of the DeptID attribute to the child table Employee ensure? A. It ensures referential integrity. B. It ensures faster data retrieval. C. It ensures atomicity. D. It ensures domain integrity. QUESTION 96 Which of the following properties of the database transaction has been defined in the given statement: "Either all the changes or no changes have been made in the database." A. Atomicity B. Isolation C. Durability

46 D. Consistency QUESTION 97 You work as a Database Administrator for Pass4sure.com. You have created a table named Student. You want to create a view named student_view for this table. Which of the following syntaxes will you use to accomplish the task? A. CREATE OR REPLACE VIEW My_view... B. CREATE VIEW student_view... C. Insert VIEW student_view... D. CREATE student_view VIEW... Correct Answer: B QUESTION 98 Which of the following are the attributes of a simple view? Each correct answer represents a complete solution. Choose all that apply. A. It fetches data from two or more tables. B. It does not have any usage of SQL group functions or grouping of data. C. It fetches data from one database table only. D. DML operations are allowed on the view. Correct Answer: BCD QUESTION 99 Which of the following statements is true about the UNION operator? A. The UNION operator is similar to the OUTER JOIN operator. B. The UNION operator cannot be used for more than two tables. C. The UNION operator is based on the relationship between the two tables. D. The UNION operator is used to combine the result-sets.

47 QUESTION 100 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employee in the Sales database. Under unavoidable circumstances, you have to change the structure of the Employee table. Before changing the structure, you want to copy the data to a new table. For this, you have created a table named NewEmp with the same structure. Which of the following statements will you use to copy all the data from Employee to NewEmp? A. INSERT NewEmp SELECT * FROM Employee; B. INSERT INTO NewEmp FROM Employee; C. INSERT NewEmp FROM Employee; D. INSERT INTO NewEmp SELECT * FROM Employee; QUESTION 101 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You want to use group functions, so you have decided to put an alias of group functions as 'GP'. Which of the following are the correct ways to use group functions? Each correct answer represents a complete solution. Choose all that apply. A. GP1(group_item) = result B. GP1(GP2(GP3(group_item))) = result C. GP1(GP2(group_item)) = result D. GP1(GP2(GPn(group_item))) = result C QUESTION 102 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. The database contains a table named Employees. You want to remove an index named Emp_name_idx from the Employees table. Which of the following statements should you use to accomplish the task? A. DELETE INDEX Emp_name_idx; B. CANCEL INDEX Emp_name_idx; C. REMOVE INDEX Emp_name_idx;

48 D. DROP INDEX Emp_name_idx; QUESTION 103 You work as a Database Administrator for Pass4sure.com. The company uses the MySQL database. You have created a table named Employees. The table contains the following structure. The company has three departments. A task has been assigned to you to calculate the sum of the average length of employees' last name per department. Which of the following queries will you execute to accomplish the task? A. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees ORDER BY department_id; B. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees WHERE department_id=not NU LL; C. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees HAVING department_id; D. SELECT SUM(AVG(LENGTH(last_name))) FROM Employees GROUP BY department_id; QUESTION 104 Which of the following terms is described in the statement below? "It is procedural code that is automatically executed in response to certain events on a particular table or view in a database." A. Database trigger B. Datetime data type C. Table D. Data type

49 QUESTION 105 You work as a Database Administrator for Pass4sure.com. You have created a table named Employees and an index named emp_index. You find that the index is not working properly and thus you want to remove it. Which of the following statements will you use to accomplish the task? A. DELETE INDEX emp_index B. REMOVE INDEX emp_index C. CANCEL INDEX emp_index D. DROP INDEX emp_index QUESTION 106 You work as a Database Administrator for Pass4sure.com. You have created a table named Students in a database. You want to add a PRIMARY KEY constraint to the Student_ID column of the Students table. Which of the following statements will you use to accomplish the task? A. UPDATE TABLE Students ADD CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); B. MODIFY CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); C. ALTER TABLE Students ADD CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); D. ADD CONSTRAINT Stu_ID_pk PRIMARY KEY (Student_ID); Correct Answer: C QUESTION 107 What kind of join automatically joins two or more tables based on common column names? A. Equi-join B. Inner Join C. Self Join D. Natural Join

50 QUESTION 108 Review the following ER diagram: Which of the following queries will properly display the average unit_cost (rounded to two decimal places) for a given product on a Saturday and Order the results by the PROD_NAME column? A. SELECT a.prod_name, AVG(b.unit_cost) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday' GROUP BY a.prod_name ORDER BY a.prod_name; B. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday'; C. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday D. GROUP BY a.prod_name ORDER BY ROUND(AVG(b.unit_cost),2); E. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id AND c.time_id=b.time_id AND c.day_name='saturday' GROUP BY a.prod_name ORDER BY a.prod_name; F. SELECT a.prod_name, ROUND(AVG(b.unit_cost),2) FROM products a, costs b, times c WHERE a.prod_id=b.prod_id

51 AND c.time_id=b.time_id AND c.day_name='saturday' ORDER BY a.prod_name; QUESTION 109 Which of the following is the correct syntax for the DESCRIBE command? A. DESC[RIBE] {[schema.] Object. table_name} B. DESC[RIBE] {[schema.] Object C. DESC[RIBE] {[schema.] table_name} D. DESC[RIBE] {[schema.entity] WHERE Correct Answer: B QUESTION 110 Which of the following are true about UPDATE statements? Each correct answer represents a complete solution. Choose all that apply. A. You can use co-related sub query in UPDATE statements to update data from other tables. B. If you don't use the WHERE clause then the UPDATE will not update any rows in the table. C. You use the SET clause to update multiple columns of a table separated by commas. D. You can use the WHERE clause to have your update affects a specific set of rows. CD QUESTION 111 Which of the following INSERT statements is correct? A. INSERT INTO Employees VALUES (1001, 'Maria', '100 Park Street', '17-JUN-99'); B. INSERT INTO Employees VALUES (1001, 'Maria', '100 Park Street', '17-JUN-99') C. INSERT Employees (1001, 'Maria', '100 Park Street', '17-JUN-99'); D. INSERT INTO Employees VALUES (1001, Maria, 100 Park Street, '17-JUN-99');

52 QUESTION 112 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees. You want to insert a row in the table. The structure of the table is as follows: Emp_ID NUMBER PRIMARY KEY Emp_Name VARCHAR2 (30) Emp_Address VARCHAR2 (40) Which of the following statements can you use to accomplish the task? Each correct answer represents a complete solution. Choose all that apply. A. INSERT INTO Employees ('Adam', 'California'); B. INSERT INTO Employees VALUES (100, 'Adam', 'California'); C. INSERT INTO Employees (Emp_Name, Emp_Address) VALUES ('Adam', 'California'); D. INSERT INTO Employees (Emp_ID, Emp_Name, Emp_Address) VALUES (100, 'Adam', 'California'); Correct Answer: BD QUESTION 113 Relational Database Management System supports a mechanism known as concurrency control and locking for sharing of data. Which of the following are achieved through concurrency control and locking? Each correct answer represents a complete solution. Choose three. A. Isolation B. Consistency C. Atomicity D. Referential Integrity BC QUESTION 114 Which of the following clauses is used with the CREATE VIEW statement?

53 A. ORDER BY B. WHERE C. WITH CHECK OPTION D. GROUP BY Correct Answer: C QUESTION 115 Adam works as a Database Administrator for Pass4sure.com. He creates a table named Students. He wants to create a new table named Class with the help of the Students table. Which of the following syntaxes will Adam use to accomplish the task? A. CREATE TABLE Class INSERT INTO SELECT * FROM Students; B. CREATE TABLE Class AS SELECT * FROM Students; C. CREATE TABLE Class (SELECT * FROM Students); D. CREATE TABLE Class FROM SELECT * FROM Students; Correct Answer: B QUESTION 116 Which of the following statements will a user use to display a database in MySQL? A. SHOW DATABASE; B. SELECT * FROM DATABASES; C. VIEW DATABASES; D. DISPLAY DATABASES; QUESTION 117 Consider the following exhibit: SQL> DESC Employee

54 The Employee table has 14 rows. You want to retrieve the names of all employees and their managers. Therefore, you issued the following query: SELECT e.ename, m.ename FROM employee e INNER JOIN employee m ON e.manager_id = m.employee_id; How many records will the above query retrieve? A. 1 B. 0

55 C. 13 D. 14 Correct Answer: C QUESTION 118 Which of the following methods is used to search a string based on a regular expression? A. find() B. discover() C. seek() D. match() QUESTION 119 You work as a Database Administrator for Pass4sure.com. You have created a table named Student. You want to create a view named student_view for this table. Which of the following syntaxes will you use to accomplish the task? A. CREATE student_view VIEW... B. CREATE OR REPLACE VIEW My_view... C. CREATE VIEW student_view... D. Insert VIEW student_view... Correct Answer: C QUESTION 120 Which of the following clauses is used with the CREATE VIEW statement? A. WHERE B. ORDER BY C. WITH CHECK OPTION D. GROUP BY Correct Answer: C

56 QUESTION 121 Which of the following statements are true about a table name? Each correct answer represents a complete solution. Choose all that apply. A. It can be up to 45 characters long. B. It should be unique, meaningful, and descriptive. C. It can contain only three special characters: the dollar sign ($), the underscore (_), and the pound sign (#). D. It must begin with an alphanumeric character and may contain a digit. Correct Answer: BCD QUESTION 122 Which of the following statements will delete all the records from the table T1? Each correct answer represents a complete solution. Choose all that apply. A. DELETE * FROM T1; B. DELETE T1; C. DELETE FROM T1; D. TRUNCATE TABLE T1; Correct Answer: BCD QUESTION 123 Adam works as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. Adam has created a table named Employees in the database. He wants to retrieve the information of those employees who have at least one person reporting to them. Which of the following queries will Adam execute to accomplish the task? A. SELECT employee_id, last_name, job_id, department_id FROM Employees outer WHERE EXISTS (SELECT 'x' FROM Employees WHERE manager_id = outer.employee_id); B. SELECT employee_id, last_name, job_id, department_id FROM Employees WHERE employee_id IN (SELECT manager_id WHERE manager_id is NOT NULL); C. SELECT employee_id, last_name, job_id, department_id FROM Employees HAVING employee_id IN (SELECT manager_id FROM Employees WHERE manager_id is NOT NULL); D. SELECT employee_id, last_name, job_id, department_id FROM Employees WHERE employee_id EXISTS (SELECT manager_id WHERE manager_id is NULL);

57 QUESTION 124 If you want to create a simple database view on which other privileged users should not be able to perform DML operations, then which of the following options will you choose? Each correct answer represents a complete solution. Choose all that apply. A. Create the view as a Complex View. B. Create the view with the WITH READ ONLY option. C. Grant only SELECT access on the view to users. D. Create the view with the WITH CHECK OPTION option. Correct Answer: BC QUESTION 125 Which of the following SQL functions may require the use of a GROUP BY clause in a SELECT statement? Each correct answer represents a complete solution. Choose all that apply. A. TO_CHAR B. LOWER C. SUM D. AVG E. TO_NUMBER Correct Answer: CD QUESTION 126 Fill in the blank with the appropriate word. are important for database integrity, because they mean that the database can be restored to a clean copy even after erroneous operations are performed. A. Rollbacks

58 QUESTION 127 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database development platform. You have created a table named Employees in the database. You want to insert a row in the table. To accomplish the task, you have written an INSERT statement. Which of the following options will be followed by the input data in the INSERT statement? A. INSERT B. TABLE C. INTO D. VALUES Correct Answer: C QUESTION 128 Fill in the blank with the appropriate word. An is a combination of values, variables, operators, and functions that are interpreted according to some particular rules of precedence and of association for a particular programming language, which first computes and then produces another value. A. expression QUESTION 129 Consider the exhibit given below: SQL> DESC ORDERS;

59 Which of the following queries will return the name of the customer who placed the highest amount of orders and the total order amount? A. SELECT CUSTOMER, MAX(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS GROUP BY CUSTOMER / B. SELECT CUSTOMER, SUM(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS WHERE SUM(UNITPRICE*QUANTITY)= (SELECT MAX(SUM(UNITPRICE*QUANTITY)) FROM ORDERS GROUP BY CUSTOMER) GROUP BY CUSTOMER / C. SELECT CUSTOMER, SUM(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS GROUP BY CUSTOMER HAVING SUM(UNITPRICE*QUANTITY)= (SELECT SUM(UNITPRICE*QUANTITY) FROM ORDERS GROUP BY CUSTOMER) / D. SELECT CUSTOMER, SUM(UNITPRICE*QUANTITY) AS "TOTAL" FROM ORDERS GROUP BY CUSTOMER HAVING SUM(UNITPRICE*QUANTITY)= (SELECT MAX(SUM(UNITPRICE*QUANTITY)) FROM ORDERS GROUP BY CUSTOMER) / QUESTION 130 Which of the following are the attributes of a simple view? Each correct answer represents a complete solution. Choose all that apply. A. DML operations are allowed on the view. B. It does not have any usage of SQL group functions or grouping of data. C. It fetches data from one database table only. D. It fetches data from two or more tables. BC QUESTION 131 Which of the following data types can be used in MySQL? Each correct answer represents a complete solution. Choose all that apply.

60 A. Function B. String C. Numeric D. Date and Time Correct Answer: BCD QUESTION 132 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have written the following MySQL statement to calculate the salary of employees: SELECT (5000+((base_salary*5.0)/100)) FROM Employees; What will happen if you remove the parentheses from the statement? A. The output will be more than the desired output. B. The output will be less than the desired output. C. A syntax error will occur. D. The same value will be displayed. QUESTION 133 You work as a Database Administrator for Pass4sure.com. You have created a new table named Students. You want to create a foreign key constraint on the student_id in the Students table. Which of the following statements will you follow to accomplish the task? A. Use the UPDATE TABLE command with the ADD clause on the Students table. B. Use the CHANGE TABLE command with the ADD clause on the Students table. C. Use the ALTER TABLE command with the ADD clause on the Students table. D. Use the MODIFY TABLE command with the ADD clause on the Students table. Correct Answer: C QUESTION 134

61 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as the database development platform. You have created a database named Employee. Which of the following statements will prevent you from getting error messages if a database with the given name already exists on the database server? A. CREATE DATABASE NOT EXISTS Employee; B. CREATE DATABASE IF NONAME EXISTS Employee; C. CREATE DATABASE NONAME EXISTS Employee; D. CREATE DATABASE IF NOT EXISTS Employee; QUESTION 135 Which of the following statements is correct for equijoin used to join two tables named Employees and Department? A. SELECT D.Dept_Name, E.Emp_Name FROM Departments d1, Employees e1 HAVING Dept_Name, Emp_Name; B. SELECT E.Emp_Name, D.Dept_Name FROM Departments d1, Employees e1 WHERE Dept_No = Dept_No ORDER BY Dept_Name, Emp_Name; C. SELECT Dept_Name, Emp_Name FROM Departments d1, Employees e1 ORDER BY Dept_Name, Emp_Name; D. SELECT Dept_Name, Emp_Name FROM Departments d1, Employees e1 WHERE d1.dept_no = e1.dept_no ORDER BY Dept_Name, Emp_Name; QUESTION 136 You work as a Database Designer for RealTech Inc. You have to design the database of a bank. The database has two tables: Employee and Department. The Employee table has the following attributes: EmpID (PK) DeptID (FK) Name

62 DateOfBirth Designation The Department table has the following attributes: DeptID (PK) DepartmentName DeptID is the primary key (PK) of the Department table, whereas, after migration, in the above Employee table, it is the foreign key (FK). What does migration of the DeptID attribute to the child table Employee ensure? A. It ensures atomicity. B. It ensures referential integrity. C. It ensures faster data retrieval. D. It ensures domain integrity. Correct Answer: B QUESTION 137 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. You want to create a list of employees working in the organization, but you do not want to display any duplicate row in the report. Which of the following statements will help you to accomplish the task? A. SELECT emp_id, emp_name FROM Employees; B. SELECT emp_id, emp_name FROM Employees GROUP BY emp_id; C. SELECT emp_id, emp_name FROM Employees ORDER BY emp_id; D. SELECT DISTINCT emp_id, emp_name FROM Employees; QUESTION 138 You work as a Database Administrator for Pass4sure.com. You have created a table named Students in the database. Following are the data contained in this table.

63 You have written the following query to retrieve records from the Students table. SELECT Stu_ID, Last_Name, SUM(Fees) FROM Students WHERE Fees < 3000 GROUP BY Class ORDER BY Last_Name; You get an error on executing the query. Which of the following is the cause of the error? A. GROUP BY Class B. ORDER BY Last_Name C. FROM Students D. WHERE Fees < 3000 QUESTION 139 Which of the following update statements will change the salary and job title of employee Scott to that of Adams? Each correct answer represents a complete solution. Choose all that apply. A. UPDATE EMP SET JOB=(SELECT JOB FROM EMP WHERE ENAME='ADAMS'), SAL=(SELECT SAL FROM EMP WHERE ENAME='ADAMS') WHERE ENAME='SCOTT'; B. UPDATE EMP SET (SAL,JOB)=(SELECT SAL,JOB FROM EMP WHERE ENAME='SCOTT') WHERE ENAME='ADAMS'; C. UPDATE EMP SET SAL=(SELECT SAL FROM EMP WHERE ENAME='ADAMS'), JOB=(SELECT JOB FROM EMP WHERE ENAME='ADAMS') WHERE ENAME='SCOTT'; D. UPDATE EMP SET (SAL,JOB)=(SELECT SAL,JOB FROM EMP WHERE ENAME='ADAMS') WHERE ENAME='SCOTT';

64 CD QUESTION 140 You work as a Database Administrator for Pass4sure.com. The company uses MySQL as its database. You have created a table named Employees in the database. The table has the following data. Now, you want to remove the records of those persons whose last Name is 'Smith' and first name is 'Jack' from the Employees table. Which of the following statements will you use to accomplish the task? A. DELETE Last_Name= 'Smith' AND First_Name='Jack' FROM Employees B. REMOVE FROM Employees WHERE Last_Name= 'Smith' AND First_Name='Jack' C. REMOVE Last_Name= 'Smith' AND First_Name='Jack' FROM Employees D. DELETE FROM Employees WHERE Last_Name= 'Smith' AND First_Name='Jack' QUESTION 141 Which of the following declarations defines the maximum length of a CHAR datatype columns in bytes? A. CHAR (20 BYTE) B. CHAR (20) C. CHAR (20) BYTE D. Both CHAR (20) and CHAR (20 BYTE)