Interview Questions

1. 1. Which of these selection statements test only for equality?

Options:

a. if

b. switch

c. if & switch

d. None of the mentioned

Reveal Answer

2. 2. Which of these are selection statements in Java?

Options:

a. if()

b. for()

c. continue

d. break

Reveal Answer

3. 3. Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?

Options:

a. do-while

b. while

c. for

d. None of the mentioned

Reveal Answer

4. 4. Which of these jump statements can skip processing remainder of code in its body for a particular iteration?

Options:

a. break

b. return

c. exit

d. continue

Reveal Answer

5. 5. Which of these statement is correct?

Options:

a. switch statement is more efficient than a set of nested ifs.

b. two case constants in the same switch can have identical values.

c. switch statement can only test for equality, whereas if statement can evaluate any type of boolean expression.

d. it is possible to create a nested switch statements.

Reveal Answer

6. 6. What is the output of this program? class selection_statements { public static void main(String args[]) { int var1 = 5; int var2 = 6; if ((var2 = 1) == var1) System.out.print(var2); else System.out.print(++var2); } }

Options:

a. 1

b. 2

c. 3

d. 4

Reveal Answer

7. 7.What is the output of this program? class comma_operator { public static void main(String args[]) { int sum = 0; for (int i = 0, j = 0; i < 5 & j < 5; ++i, j = i + 1) sum += i; System.out.println(sum); } }

Options:

a. 5

b. 6

c. 14

d. compilation error

Reveal Answer

8. 8. What is the output of this program? class jump_statments { public static void main(String args[]) { int x = 2; int y = 0; for ( ; y < 10; ++y) { if (y % x == 0) continue; else if (y == 8) break; else System.out.print(y + " "); } } }

Options:

a. 1 3 5 7

b. 2 4 6 8

c. 1 3 5 7 9

d. 1 2 3 4 5 6 7 8 9

Reveal Answer

9. 9. What is the output of this program? class Output { public static void main(String args[]) { int x, y = 1; x = 10; if (x != 10 && x / 0 == 0) System.out.println(y); else System.out.println(++y); } }

Options:

a. 1

b. 2

c. Runtime error owing to division by zero in if condition.

d. Unpredictable behavior of program.

Reveal Answer

10. 10. What is the output of this program? class Output { public static void main(String args[]) { int a = 5; int b = 10; first: { second: { third: { if (a == b >> 1) break second; } System.out.println(a); } System.out.println(b); } } }

Options:

a. 5 10

b. 10 5

c. 5

d. 10

Reveal Answer

11. 11.predict the output for the below code: public void foo( boolean a, boolean b) { if( a ) { System.out.println("A"); /* Line 5 / } else if(a && b) / Line 7 / { System.out.println( "A && B"); } else / Line 11 */ { if ( !b ) { System.out.println( "notB") ; } else { System.out.println( "ELSE" ) ; } } }

Options:

a. If a is true and b is true then the output is "A && B"

b. If a is true and b is false then the output is "notB"

c. If a is false and b is true then the output is "ELSE"

d. If a is false and b is false then the output is "ELSE"

Reveal Answer

12. 12.Solve this if you can? switch(x) { default: System.out.println("Hello"); } Which two are acceptable types for x? byte long char float Short Long

Options:

a. 1 and 3

b. 2 and 4

c. 3 and 5

d. 4 and 6

Reveal Answer

13. 13. what is the output for my code? switch(x) { default: System.out.println("Hello"); } Which two are acceptable types for x? byte long char float Short Long

Options:

a. 1 and 3

b. 2 and 4

c. 3 and 5

d. 4 and 6

Reveal Answer

14. 14.what is the output for this code public class While { public void loop() { int x= 0; while ( 1 ) /* Line 6 / { System.out.print("x plus one is " + (x + 1)); / Line 8 */ } } } Which statement is true?

Options:

a. There is a syntax error on line 1.

b. There are syntax errors on lines 1 and 6.

c. There are syntax errors on lines 1, 6, and 8.

d. There is a syntax error on line 6.

Reveal Answer

15. 15.Which of these operators is used to allocate memory to array variable in Java?

Options:

a. malloc

b. alloc

c. new

d. new malloc

Reveal Answer

16. 16. Which of these is an incorrect array declaration?

Options:

a. int arr[] = new int[5]

b. int [] arr = new int[5]

c. int arr[] = new int[5]

d. int arr[] = int [5] new

Reveal Answer

17. 17.What will this code print? int arr[] = new int [5]; System.out.print(arr);

Options:

a. 0

b. value stored in arr[0].

c. 00000

d. Garbage value

Reveal Answer

18. 18.What is the result of compiling and running the following code? public class Test { public static void main(String[] args) { int[] a = new int[0]; System.out.print(a.length); } }

Options:

a. 0

b. Compilation error, arrays cannot be initialized to zero size.

c. Compilation error, it is a.length() not a.length

d. None of the above

Reveal Answer

19. 19.What will be the output? public class Test { public static void main(String[] args) { int[] x = new int[3]; System.out.println("x[0] is " + x[0]); } }

Options:

a. The program has a compile error because the size of the array wasn't specified when declaring the array.

b. The program has a runtime error because the array elements are not initialized.

c. The program runs fine and displays x[0] is 0.

d. The program has a runtime error because the array element x[0] is not defined.

Reveal Answer

20. 20.What is the output of the following code? public class Test { public static void main(String args[]){ double[] myList = {1, 5, 5, 5, 5, 1}; double max = myList[0]; int indexOfMax = 0; for(int i = 1; i < myList.length; i++) { if(myList[i] > max) { max = myList[i]; indexOfMax = i; } } System.out.println(indexOfMax); } }

Options:

a. 0

b. 1

c. 2

d. 3

e. 4

Reveal Answer

21. 21. what is the output for the following code? int[] ar=new int[9]; System.out.println(arr[0]);

Options:

a. 0

b. some junk value

c. error because array

d. error because index must is not initialized be greater than zero

Reveal Answer

22. 22.Which of the following is FALSE about arrays on Java?

Options:

a. A java array is always an object

b. Length of array can be changed after creation of array

c. Arrays in Java are always allocated on heap

Reveal Answer

23. 23.Predict the output? // file name: Main.java public class Main { public static void main(String args[]) { int arr[] = {10, 20, 30, 40, 50}; for(int i=0; i < arr.length; i++) { System.out.print(" " + arr[i]); } } }

Options:

a. 10 20 30 40 50

b. Compiler Error

c. 10 20 30 40

Reveal Answer

24. 24. Find the output for below code? class Test { public static void main(String args[]) { int arr[2]; System.out.println(arr[0]); System.out.println(arr[1]); } }

Options:

a. 0 0

b. garbage value garbage value

c. Compiler Error

d. d.Exception

Reveal Answer

25. 25. Find the output below code? class Test { public static void main (String[] args) { int arr1[] = {1, 2, 3}; int arr2[] = {1, 2, 3}; if (arr1 == arr2) System.out.println("Same"); else System.out.println("Not same"); } }

Options:

a. Same

b. Not Same

Reveal Answer

Interview Questions and Answer

1. 1. Which of these selection statements test only for equality?

2. 2. Which of these are selection statements in Java?

3. 3. Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?

4. 4. Which of these jump statements can skip processing remainder of code in its body for a particular iteration?

5. 5. Which of these statement is correct?

6. 6. What is the output of this program? class selection_statements { public static void main(String args[]) { int var1 = 5; int var2 = 6; if ((var2 = 1) == var1) System.out.print(var2); else System.out.print(++var2); } }

7. 7.What is the output of this program? class comma_operator { public static void main(String args[]) { int sum = 0; for (int i = 0, j = 0; i < 5 & j < 5; ++i, j = i + 1) sum += i; System.out.println(sum); } }

8. 8. What is the output of this program? class jump_statments { public static void main(String args[]) { int x = 2; int y = 0; for ( ; y < 10; ++y) { if (y % x == 0) continue; else if (y == 8) break; else System.out.print(y + " "); } } }

9. 9. What is the output of this program? class Output { public static void main(String args[]) { int x, y = 1; x = 10; if (x != 10 && x / 0 == 0) System.out.println(y); else System.out.println(++y); } }

10. 10. What is the output of this program? class Output { public static void main(String args[]) { int a = 5; int b = 10; first: { second: { third: { if (a == b >> 1) break second; } System.out.println(a); } System.out.println(b); } } }

12. 12.Solve this if you can? switch(x) { default: System.out.println("Hello"); } Which two are acceptable types for x? byte long char float Short Long

13. 13. what is the output for my code? switch(x) { default: System.out.println("Hello"); } Which two are acceptable types for x? byte long char float Short Long

14. 14.what is the output for this code public class While { public void loop() { int x= 0; while ( 1 ) /* Line 6 / { System.out.print("x plus one is " + (x + 1)); / Line 8 */ } } } Which statement is true?

15. 15.Which of these operators is used to allocate memory to array variable in Java?

16. 16. Which of these is an incorrect array declaration?

17. 17.What will this code print? int arr[] = new int [5]; System.out.print(arr);

18. 18.What is the result of compiling and running the following code? public class Test { public static void main(String[] args) { int[] a = new int[0]; System.out.print(a.length); } }

19. 19.What will be the output? public class Test { public static void main(String[] args) { int[] x = new int[3]; System.out.println("x[0] is " + x[0]); } }

21. 21. what is the output for the following code? int[] ar=new int[9]; System.out.println(arr[0]);

22. 22.Which of the following is FALSE about arrays on Java?

23. 23.Predict the output? // file name: Main.java public class Main { public static void main(String args[]) { int arr[] = {10, 20, 30, 40, 50}; for(int i=0; i < arr.length; i++) { System.out.print(" " + arr[i]); } } }

24. 24. Find the output for below code? class Test { public static void main(String args[]) { int arr[2]; System.out.println(arr[0]); System.out.println(arr[1]); } }

25. 25. Find the output below code? class Test { public static void main (String[] args) { int arr1[] = {1, 2, 3}; int arr2[] = {1, 2, 3}; if (arr1 == arr2) System.out.println("Same"); else System.out.println("Not same"); } }

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