QUESTION BANK CLASS- XI ( INFORMATICS PRACTICES)

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1 QUESTION BANK CLASS- XI ( INFORMATICS PRACTICES) Q1. (a) What will be the value of j = -- k + 2* k+ (l = k, l++) if k is 20 initially. (b) What do you mean by token? (c) What is byte code? (d) What is Candidate key? (e) Differentiate Syntax Error and Semantic errors. (f) What is the difference between a Text Field and Text Area? (g)given the following code fragment int ch = 20; System.out.println( ++ ch); System.out.println( ch); (i) (ii) What output does the above code? What is the effect of replacing ++ch with ch+1 Q2. (a) A list namely PlayerList has SelectionMode property set to SINGLE_INTERVAL. How would you obtain the selected values? Give example. (b) Write a statement in java to display message Hello using dialog box. (c) What do you mean by conditional operator? Explain it with one suitable example. (d) What will be displayed in output window after the execution of the following loop? int ptr=5, cnt; for(cnt= 10; cnt>0; cnt = cnt/2) ptr = ptr +cnt; SOP( ptr : + ptr + + cnt : + cnt); (e) Write java code that takes one value of integer type. Find out cube of it. Assign result to the String object and display result. Q3.(a) What do you mean class and object? Explain. Also mention the class from which the jpasswordfield1 belongs? 1

2 (b) Rewrite the following program using a switch statement. String s = jtextfield1.gettext(); String message ; char choice = s.charat(0);// a method to extract first character if( choice== A ) message = Better ; else if (choice = = B choice = = C ) message = Good ; else message = Average ; (c) What will be displayed in jtextarea1 after executing the following statement? 1 jtextarea1.settext( World\nCup\t2015 ); (d) Find the output of the following code:- String text1 = Computer String text2 = world ; text1 = text1.tolowercase ( ); String message = text1.concat (text2); System.out.println (message+(message.length( )+4)); (e) How many times is the following loop executed? And also convert it into for loop. int number =5; do { System.out.println(number); Number - - ; }while( number > =1); (f) Find out the errors, if any int Counter =0; 2

3 mm=0; While (Counter < 10) { } if( Counter % 2 = 0) { } Counter++; mm = / 10; jtf1.puttext(mm); (g) Kanak Enterprises is a Yarn Manufacturing Company. The Human Resource Department manage 100 employees on regular basis. The company provides salary on two categories Temporary employee and Permanent Employee. The account department instructs the computer department to develop a salary calculation as shown below: ( the Image of Form is given at the End of Question Paper) The list of Swing controls for the above is as follows: Objects CodeTF Name TF SalaryTF otptf otttf hrstf ccatf daystf amttf tottf otatf Description Code of the Employee Name of the Employee Basic Salary of the Employee Over Time for Permanent Employee Over Time for Temporary Employee House Rent Allowances of Employee A type of Allowance of Employee Number of days worked Salary Amount Total Amount Over Time Amount (i) Write code for the both Permanent and Temporary radio Button that when use click Permanent button, then textboxes available in Temporary panel is automatically disabled. Similarly, when use click on Temporary button then 3

4 textboxes available in Permanent panel is automatically disabled. (ii) (iii) Write the code of clear button to clear all the values stored in all the text boxes and temporary employee should be selected as default employee. Write code for the calculate button to calculate the salary amount, over time amount and total amount. The criteria for salary calculation is as given below: For Permanent Employee For Temporary Employee - HRA is 20% of basic Salary - CCA is Rs Over time allowance is Rs. 75 per overtime hour - Salary amount is the sum of basic +hra+cca - Salary is Rs. 250 per day - Overtime is Rs. 50 per day overtime hours Total amount for permanent and temporary employee will be calculated as the sum of total salary amount and over time amount. Q4 Predict the output Produced by following code: int x = 0; While(1){ System.out.println( X Plus one is + (x+1)); } Q5. Given the following code fragment: if(a==0) System.out.println( Zero ); if(a==1) System.out.println( One ); if(a==2) System.out.println( Two ); if(a==3) System.out.println( Three ); Write an alternate code using if-else that save on number of comparison. 6Compare and contrast a List Box and Combo Box. 4

gettext( ); double marks = Double.parseDouble( markstf.gettext( )); 11.

5 7.Write code to obtain list of selected items from a list namely List1? 8.Why does a Combo Box fires item event twice? 9. What is dispose( ) used for? 10. Identify the errors in the following code that written in action event handler of a button namely OKbtn. double d = nametf.gettext( ); String age = agetf.gettext( ); double marks = Double.parseDouble( markstf.gettext( )); 11. Design a GUI Application as follows: Create a java desktop application Temperature Converter Fahrenheit to Celsius and vice versa. For an incorrect choice or input an appropriate error message should be displayed. 12. Write code for Calculate Button to find all prime no. between 0 to given number by user for given application. 5

6 Q13. (a) Which MySQL command helps you to see the structure of the table? (b) Mr. Karan Bairagi wants to remove the entire content of a table Hospital along with its structure to release the storage space. What MySQL command should be use? And also write the category of the command (DDL/DML). (c) Table Employee has 3 rows and 4 columns. Table Status has 5 rows and 2 columns. What will be the cardinality and degree of the Cartesian Product of Employee and Status? (d) While Creating table Status, Ms. Poonam forget to add the field TYPE with type Character and size 10. Help her to write MySQL command to do so. (e) Distinguish between alter table and update command of MYSQL with one example of each one. (f) There is a column Price in a table Product. The following two statements are giving different outputs. What may be the possible reasons? - select count(*) from Product. - select count(price) from Product; (g) What is the use of constraints in MYSQL? Write MySql Query to remove constraint the Primary Key for the field Account_Number in the table Bank. Q14.(a) What is the use of SELECT statements in SQL? How is it different from ALTER TABLE Statement? (b) Mr. Anoop Singhvi created a table SUPER with 5 rows and 7 columns. He added 4 more rows to it and delete two columns. What will be the cardinality and degree of the table SUPER? 1 (c) Mr. Ramdin runs his medical store and he created table STORE with Ayurvedic Medicines. Write SQL commands for (i) to (iv) and output for (v) to (vii) 6

7 Q15. (a) Write an SQL query to create the table SalesPerson with the following structure. (b) In a database there are two tables Books and Issued are shown below: 7

8 Write MySql queries for the following: i. To list the names from books of text type and quantity issued is more than 2. ii. ii. To display the book_id, book_name and quantity_issued for all books which have been issued. iii. iii. Display total number of books according to their types. Q16. What is the following command doing? ALTER TABLE Persons ADD CONSTRAINT chk_person CHECK( P_Id> 0 AND City = Shimla ); Q17. Given a statement as follows. CREATE TABLE Orders ( O_ID int NOT NULL, OrderNo int NOT NULL, P_ID int, PRIMARY KEY (O_ID), FOREIGN KEY(P_ID) REFERENCES Persons(P_ID)); Indentidy the number and types of constraints in the table Orders. Q18. An examination agent designs the following database tables to store the information on candidates who register for examination. Table:- CAND Field Name Type Width Description CNUM Character 8 Unique candidates number of the candidate where the first three characters are the unique school code of the candidates school. CNAME Character 30 Name of the Candidates DOB Date Date of birth of the Candidate. Table: REGISTER Field Name Type Width Description CNUM Character 8 Candidate number of the candidate who sits the examination of the subject. SCODE Character 2 Unique subject code Table:-SUBJECT Field Name Type Width Description SCODE Character 2 Unique subject code SNAME Character 30 Name of the Subject 8

9 (a) (i) Write an SQL command to create CAND (ii) Which of the following can be a candidate key of CAND? Explain Briefly. (A) CNUM (B) CNAME+DOB (b) Identify the primary key(s) and foreign key(s) of REGISTER. (c) (i) Write an SQL Command to increase the width of CNUM in CAND to 12. (ii) The subject code and subject name of a new subject are 09 and LAW respectively. Write a SQL command to insert this record in to SUBJECT. Q19. What is data redundancy & inconsistency? Q20. What should be the length of text literal in MySQL? Q21 Write any two limits of MySQL? Q22. Differentiate between DDL and DML? Q23. Table:CLUB Coach_ID CoachName Age Sports DataOfApp Pay Sex 1 Kukreja 35 Karate 27/03/ M 2 Ravina 34 Karate 20/01/ F 3 Karan 34 Squash 19/02/ M 4 Tarun 33 Basketball 07/01/ M 5 Zubin 36 Swimming 12/01/ M 6 Ketki 36 Swimming 24/02/ F 7 Ankita 39 Squash 20/02/ F 8 Zareen 37 Karate 22/02/ F 9 Kush 41 Swimming 13/01/ M 10 Shilya 37 Basketball 19/02/ M Consider the above given Table and answer the following Questions (i) To display the details of coaches whose age is greater than 40. (ii) (iii) To display the coach name, their game with highest pay. To display coach_id, coach name and date of appointment in descending order. Q24.Write the command to display the table name with their columns name with example. Q25. Write a query to enter the following record in the table- Employee. 9

10 E25001 Albert Sieman D012 To insert the NULL value in Designation and Default value in Salary. Q26.Given the following tables: Orders(OrdNo, Ord_date, ProdNo#, Qty) Product(ProdNo, Descp, Price) Payment(OrdNo,Pment) Note:- Pment field is Boolean data type. Q27. Write a query to delete all those records from table Orders whose complete payment has been made. Q28. How is FOREIGN KEY commands different from PRIMARY KEY command? Q29. What is the role of UNIQUE constraint? How is PRIMARY KEY constraint different from UNIQUE constraint? Q30. Identify the Error: DELETE ALL FROM TABLE EMPL; Q31. Write Query statements for the following transactions : (Consider tables of Question 3 (c)) (i) Increase price of all products by 10% (ii) List the details of all orders whose payment is pending as per increased price. (iii) Decrease prices by 10% for all those products for which orders were placed 10 months before. Q32. Write a query to display the name of employee whose name contains A as third alphabet. Q33. Write query to display the name, job title and salary of employee who don t have manager. Q34. Write the command to create the name of Constraint using Create Table. Q35. Write a query to update the salary with 12 % of existing salary of Employee Table. Q36. Write a query to display a list of members from DELHI, MUMBAI, CHENNAI or BANGLORE cities from member table. 10

11 Q37. Write Query statements for the following transactions: (i) (ii) (iii) To change the existing column name ENAME of table Employee to EMP_NAME. Write a query to delete the DESIG column of the EMPLOYEE table. What is following query doing? ALTER TABLE Persons DROP PRIMARY KEY; Q38 (a) What social impact does e-governance have on society? (b) Write two important features of e-business. Give two most commonly used. Q39. How has e-governance benefitted the common man? Q40. What benefits does an e-business offer to the customers? Q41. Why do you think e-learning courses have high dropout rate? Q42. How has society benefitted from the e-governance? What issues are still to be care of? Q43. What are the impacts of ICT on Society? Q44. What is an infomania? Q45. What are the challenges of e-learning? Q46. What are the disadvantages of the followings: e-business, e-governance, e-learning. 11

INDIAN SCHOOL SOHAR FINAL EXAMINATION ( ) INFORMATICS PRACTICES (065)

INDIAN SCHOOL SOHAR FINAL EXAMINATION (2015-2016) INFORMATICS PRACTICES (065) No. of printed pages: 5 Please check that this question paper contains 5 printed pages. Please check that this question paper