11th & 12th IP 2015(Outside Delhi) Java Programming common assignment

	2015 JAVA PROGRAMMING
Q.NO 2 (a)	Write the value of variable ‘C’ after execution of the following code: int d; int c; d=7; c = (5*++d)%3;	1
Ans	1
	(1 mark for correct answer) OR (1/2 mark to be awarded if 2 is given as answer on account of Student’s knowledge about * and % operators)

(b)	What is the difference between jTextField and jPasswordField components?	1
Ans.	jTextField displays input / output characters as they are. jPasswordfield does masking of keyboard input from user, using an echo character ‘*’ by default.
	(1 mark for correct difference) OR (1/2 mark for explaining any one)
(c)	In a SWITCH statement, what is the purpose of ‘default’ section?	1
Ans.	‘default’ section is used to execute statement(s), when none of the specified cases mentioned match.
	(1 mark for correct answer)
(d)	Write java code to assign the value 500 to variable x. Increase the value of x by 50 and store it in variable y.	1
Ans	X = 500; X += 50; Y = x; OR X = 500; x = x + 50; y =  x;
	(1/2 mark for assigning 500 to x) (1 mark for increasing value of x by 50)
(e)	Write the output that will be generated by the code given below: Int I; I = 7; Int r; r=8; while (i<=10) {  System.out.printIn (r*i); I  =i+2;	2
Ans	56 72
4-a)	The following code has some error(s). Rewrite the correct code underlining all the corrections made. int  marks, temperature; marks = jTextField.getText()); temperature = Integer .parseInt (jTextField2.getText()); If (marks < 80) and (temperature >= 40) { System.out.printIn (“Not Good “); } else; {   System.out.println( “ OK “); }	2
Ans	int  marks, temperature; marks =  Integer.parseInt(jTextField.getText()); temperature = Integer .parseInt (jTextField2.getText()); If(  (marks < 80) && (temperature >= 40) ) { System.out.printIn (“Not Good “); } else {   System.out.println( “ OK “); }
4-b)	How many times will the following while loop execute? int y = 7, sum = 0; while(y <=15) {    Sum = sum + y;    y = y +2 ; }	2
Ans	5 times

11th and 12th IP Java Programming 2013( Q 2 & Q 4 ) Outside Delhi common assignment

2(a)	which property of palette list box is used to enter the list of items while working in NetBeans?	1
ANS	model property
(b)	What is the difference between the use of jTextField and JPasswordField in a form?	1
Ans	When we type text into a JTextField control, it shows the characters in the control, but in JPasswordField control the typed characters are shown as ( ) for security.
(c)	“the variable/expression in the switch statement should either evaluate to an integer value or string value”.	1
Ans	True
(e)	How many times will the following loops execute? Which one of them is entry control and which one is exit control?	2
	Loop1                                       int i=10, sum=0; While (i>1) { Sum+=i; i=3 } Loop2 int i=10, sum=0; do { Sum+=i; i-=3; }while (i>1);
Ans	Following loops will execute 3 times. Loop 1 is entry control loop and loop 2 is exit control loop.
(f)	What will be displayed in JTextField1 and jTextField2 after the execution of the following loop? Since C is the local variable to the for loop only due which it can’t be accessible at line no 4 and 4. CORRECT CODE Int sum=0,last=10; for (int C=1;C<=Last;C+=2) { Sum++; jTextField1.setText(Integer.toString(sum)); jTextField2.setText(Integer.toString©; }	2
ans	Output jTextField1-5 jTextField2-9