Informatics Practices, Class XII ( ) (Summer Vacation-2015) (Holiday H.W) Java Concepts & Programming, MySQL

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1 (Summer Vacation-2015) (Holiday H.W) Java Concepts & Programming, MySQL 1. How is ordinary compilation process different from Java compilation? 2. Differentiate between a component and a container. 3. How are keywords different from identifiers? 4. What is meant by implicit and explicit type conversion? 5. What is the purpose of break statement in a switch statement and in a loop? 6. Explain the difference between entry controlled and exit controlled loop with one example. 7. How would you set a label to have both an image as well as text? 8. You have assigned a foreground colour and background colour through foreground and background properties of a label. But the label is not showing any background colour. What could be the reason? 9. How can you make the text of a text field as un-editable text? 10. Which list property do you set for specifying the contents of a list? 11. Ms. Kiran has developed a Java application for a restaurant billing, in which check boxes and text fields are made on form. Items are shown through check boxes. Selecting check boxes displaying corresponding text fields. Name the property which Kiran should use to perform the same. 12. While working in NetBeans IDE, Ms. Kanta wants to display Cleared or Re-attempt required message depending upon marks entered in jtextfield. Help her to choose more appropriate statement out of If statement and Switch statement. 13. An application has four radio buttons added to it, but more than one radio button can be selected. What could be the reason behind their such a behaviour? 14. Give one similarity and one difference between a checkbox and a radio button. 15. What do you mean by function overloading? Explain with an example. 16. Differentiate between call by value and call by reference with example. 17. How does a class enforce data hiding? 18. Write Java code that takes the cost of a pencil from jtextfield1 and number of pencils from jtextfield2 and calculate total amount as cost*number to be displayed in jtextfield3 and 20% service tax out of total amount in jtextfield Write a for loop coding that displays the numbers from 10 to Write a function in java that takes a year as parameter and returns 1 if it is leap year and 0 otherwise. 21. Write a Java code to calculate factorial of a given number. 22. Rewrite the below code using a while loop: i=2; do{ System.out.println ( +i); i += 2; while (i < 51); joptionpane.showmessagedialog( null, Thank you ); 23. Rewrite the following program code using a switch statement. if (d ==1) day= Monday ; if (d ==2) day= Tuesday ; if (d ==3) day= Wednesday ; day= - ; Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

2 24. Rewrite the following program code using for loop: int num=6; int temp=num; while(num>=1) { temp=temp-1; if (temp%2==0) System.out.println( Is even ); System.out.println( Is odd ); num=num-2; 25. Write the output of the following statements: jtextfield1.settext( Computer.subString(2,5)); jtextfield2.settext( Informatics.subString(3)); 26. What will be the contents of jtextfield1 and jtextfield2 after executing the following code: String s = "PQR Micro Systems"; jtextfield1.settext(s.length( )+" "); jtextfield2.settext(s.tolowercase( )); 27. What will be the contents of jtextfield1 and jtextfield2 after executing the following: String name1= Informatics Practices ; name1= name1.touppercase( ); String name2= name1.substring(1,5); jtextfield1.settext(name2); jtextfield2.settext(name1); 28. What will be displayed in jtextarea1 after executing the following statement? jtextarea1.settext( CBSE \nfinal_exam_ip \t2016 ); 29. Given a string object namely subject, having value as 123 stored in it. What will be result of the following: JOptionPane.showMessageDialoge(null, + subject.length()+ Integer.parseInt(subject)); 30. An employee_id consisting of 5 digits is stored in a string variable strempid. Now Mrs. Devi wants to store this Id in Integer type of variable IntEmpId. Write Java statement to do this. 31. How many times will each of the following loops execute? Which one of these is an entry controlled loop and which one is an exit controlled loop. Loop1 int s=0,a=4; while(a<=10) { s=s+a; a=a+2; System.out.println(s); Loop2 int s=0,a=4; do { s=s+a; a=a+2; System.out.println(s); while(a<=10); 32. What will be the value of a and b after execution of following code: int a=1,b=2; if(++b<5) { a*=b; jlabel1.settext(" "+a+","+b); Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

3 33. Find the output: int f=1,i=2; do { f*=i; while(++i <5); System.out.println(f); 34. What will be the value of sum after execution of the following code? int i, sum=2; for(i=3;i<8;i++) { if(i%4==0) { sum+=i; break; sum+=i; 35. What will be the value of x after execution of the following code? Also find how many times the following loop will execute? int a=10, b=12, x=5, y=6; while(a<=b) { if(a%2==0) x=x+y; x=x-y; a=a+1; 36. Rewrite the correct code underlining all the corrections made: int sum=0,step=5; int I; for(i=0, i=<5, i++) { step+=5; sum+=step; jtextarea1.showtext( +sum); 37. Rewrite the correct code underlining all the corrections made: int i, j=5; i== j+5; if(i=j) { jtextfield1.settext( i and j are unequal ); jtextfield2.settext( they are not equal ); break; jtextfield1.settext( i and j are equal ) 38. Rewrite the correct code underlining all the corrections made: Int k=2 ; sum=0; { sum =k; K+=2; while (k=<20); jtextfield1.gettext( + sum); Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

39. HSBC is a bank. The Bank provides three types of loans- Car loan, House Loan, Education Loan. Make a java swing frame as shown above and accept values through jtextfields.

5% Education Loan 5%. c) Write the code for Exit button to close the application. d) Write code to make the text field for Interest rate and Discount uneditable.

4 39. HSBC is a bank. The Bank provides three types of loans- Car loan, House Loan, Education Loan. Make a java swing frame as shown above and accept values through jtextfields. Perform according to following questions: a) Write the command to clear all the text boxes. b) Write the commands to show interest rate according to the following criteria: Car loan 10% House Loan 8.5% Education Loan 5%. c) Write the code for Exit button to close the application. d) Write code to make the text field for Interest rate and Discount uneditable. e) Calculate the discount on the amount according to following criteria. If amount > 10,000,00 and < 20,000,00 then 20% discount. If amount > 20,000,00 then 25 % discount. 40. Following is a JAVA interface to input the details of student for annual fee collection. Criteria of fee are as follows: The additional charges Hostel, mess and internet charges will be applicable only if selected. a) Write code on calculate button to calculate annual fee to be deposited. b) Write code on clear button to clear all the text fields, radio buttons and check box. 41. Naved wants to list the names of all the tables in his database namely Status. What commands should he write at MySQL prompt to get this result? 42. Pooja, a student of class XI, created a table Book. Price is a column of this table. To find the details of books whose prices have not been entered, she wrote following query: select * from Book where Price= NULL; Help Pooja to run the query by removing the errors from the query and rewriting it. Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

5 43. Sheela needs to remove all the rows in the Sales table to release the storage space without to remove the table structure. Which statement should she use? 44. Add one column of data type varchar and size 30 to the table customer. 45. What will be the output of following queries on the basis of employee table: empid ename salary A1 Bob NULL B1 John 4000 B2 Tom 5000 (a) select count(salary) from employee; (b) select count(*) from employee; (c) select avg(salary) from employee; (d) select salary+100 from employee where empid=b1; (e) select concat( empid,empid), salary from employee where empid=b2; 46. Create table Employee as per following Table instance chart. Column Name EmpID Ename EmpPhone EmpSal DeptID Key Type Primary Foreign Nulls/Unique Not Null Unique FK Table Department FK Column Dept_ID Datatype Char Varchar Number Number Varchar Size , In a database there are two tables LOAN and BORROWER as shown below: LOAN Loan_No Branch_Name Amount K-170 Downtown K-230 Redwood K-260 Perryridge BORROWER Borrower_ID Customer_Name Loan_No 1061 Jones K Smith K Hayes K-230 (a) What is the degree and cardinality of Cartesian product or cross join of these two tables? (b) Which column in the BORROWER table is the foreign key? Give reason also. (c). Identify the primary key column in table BORROWER. 48. Consider the tables DOCTOR and SALARY given below. With reference to these tables, Write commands in SQL for (a) and (d) and output for (e) below: DOCTOR No NAME DEPT SEX EXPERIENCE 301 Raj ENT M Rohan ORTHEPEDIC M Maria CARDIOLOGY M Mathew ENT F 3 Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

6 SALARY No Basic Allowance Fees Informatics Practices, Class XII ( ) (a) Display the average salary of all the doctors working in ENT department. (where salary is sum of basic and allowance) (b) Display the minimum allowance of female doctors. (c) Display the doctor no, doctor name and corresponding basic for each doctor. (d) Display the list of all doctors who charge fees less than 400. (e) Select NAME, BASIC, ALLOWANCE FROM DOCTOR, SALARY WHERE FEES>=500 AND DOCTOR.NO=SALARY.NO; 49. Consider the following tables Item and Customer. Write SQL commands for the statements (i) to (iv) and give output for SQL queries (v) to (viii). TABLE: ITEM I_ID ItemName Manufacturer Price PC01 Personal Computer ABC LC05 Laptop ABC PC03 Personal Computer XYZ PC06 Personal Computer COMP LC03 Laptop PQR TABLE: CUSTOMER C_ID CustomerName City I_ID 01 N Roy Delhi LC03 06 H Singh Mumbai PC03 12 R Pandey Delhi PC06 15 C Sharma Delhi LC03 16 K Agarwal Bangalore PC01 (i) To display the details of those Customers whose City is Delhi. (ii) To display the details of Items whose Price is in the range of to (Both values included). (iii) To display the CustomerName, City from table Customer and ItemName and Price from table Item, with their corresponding matching I_ID (iv) To increase the Price of all Items by 1000 in the table Item. (v) SELECT DISTINCT City FROM Customer; (vi) SELECT ItemName, MAX(Price), Count(*) FROM Item GROUP BY ItemName; (vii) SELECT CustomerName, Manufacturer FROM Item, Customer WHERE Item.I_Id=Customer.I_Id; (viii) SELECT ItemName, Price * 100 FROM Item WHERE Manufacturer='ABC'; Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

7 50. Consider the table BUS given below: Busno Origin Dest Rate KM Time Type 21 Del Jul AC 198 Del Amrit NULL NULL 101 Chandi Del NON AC 49 Mum Pune NON AC 12 Del Agra AC 25 Del Hrdw NON AC 24 Del Agra NON AC (a) Insert a new row in the table BUS with data: 22, Agra, Delhi, 50, 330, 14.00, AC (b) Modify a row of Busno 198 by changing the Rate to 30 and type to NON AC. (c) Add a new column Tax_Charge number(6) with constraint NOT NULL to the table. (d) Display the starting and the destination stations together in one column. (e) Display the number of buses which start from Delhi before 10 am. (f) To display a report with busno, origin and destination for only those buses whose time is between 11 am and 11 pm. (g) To display the origin along with sum of km for each origin. Give the output of the following MySQL queries: (h) Select Busno, Type from BUS where dest in( Del, Agra ); (i) Select Busno, Origin, Dest from Bus where Dest like A% ; Mohd. Hashim, PGT (Computer Sc.), hashim_mbd@yahoo.co.in,

KENDRIYA VIDYALAYA SANGATHAN BLUE PRINT INFORMATICS PRACTICES CLASS XII

KENDRIYA VIDYALAYA SANGATHAN BLUE PRINT INFORMATICS PRACTICES CLASS XII TOPICS SA() SA() LA(6) TOTAL Networking & Open 4(4) 3(6) - 7(0) Source software Programming in Java 7(7) 6() (6) 4(5) RDBMS 6(6)