Java Programming Questions and Answers

Showing 31 - 37 of 37 questions

Which of the following is an invalid variable name in Java?

A. $char

B. 1mynumber

C. caseof

D. _int

correct answer b

Consider the following piece of code:

float lu luckyNumber = 1.25;

System.out.println ( "The value of luckyNumber: " + luckyNumber );

What is the result?

A. The value of lucky number::

B. The value of lucky number: 1.25

C. The code would not compile

D. The code will compile but will give a runtime error.

correct answer c

Look this code:

1. class CodeWalkOne {

2. public static void main(String [] args) {

3. int [] counts = {1,2,3,4,5};

4. counts[1] = (counts[2] == 2) ? counts[3] : 99;

5. System.out.println(counts[1]);

6. }

7. }

What is the result?

A. Compilation fails on line 4.

B. 3

C. 4

D. 99

correct answer d

Consider the following code fragment:

1. public class Question{

2. public static void main(String[] args) {

3. byte x = 21;

4. byte y = 13;

5. int z = x^y;

6. System.out.println(z);

7. }

8. }

What is the result of this code fragment?

A. 24

B. 29

C. 21

D. A compiler error occurs at line 5.

correct answer a

Which of the following expressions is legal?

A. int x=9;

B. int y=!x;

C. double z=9.00>>2;

D. int i=^7;

correct answer a

Which of the following statements would not produce the compile error?

A. char my_char='c';

B. char your_char='int';

C. char what='hello';

D. char what_char="L";

correct answer a

Which of the following statements would not produce the compile error?

A. char my_char='c';

B. char your_char='int';

C. char what='hello';

D. char what_char="L";

correct answer a

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