Explore topic-wise MCQs in Java Programming.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Java Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the output of this program?import java.util.*; public class ArrayExample { public static void main(String args[]) { int arr[] = new int [10]; for (int k = 10; k > 0; k--) arr[10 - k] = k; Arrays.sort(arr); for (int k = 0; k < 7; ++k) System.out.print(arr[k]); } }

A. 1245
B. 12345
C. 123
D. 123450
E. 1234567
Answer» F.
Discussion
2.

What will this code print?public class array { public static void main(String args[]) { int arr[] = new int [7]; System.out.print(arr); } }

A. [I@2a139a55
B. Runtime Error
C. 0 0 0 0 0 0 0
D. Compilation error
E. None of these
Answer» B. Runtime Error
Discussion
3.

What is the output of this program?public class arr_output { public static void main(String args[]) { char arr_var [] = new char[10]; for (int i = 0; i < 5; ++i) { arr_var[i] = 'K'; System.out.print(arr_var[i] + " "); } } }

A. 0 1 2 3 4 5
B. K k k k k
C. 1 2 3 4 5
D. i i i i i
E. k k k k k k k k k k
Answer» C. 1 2 3 4 5
Discussion
4.

What is the output of this program?public class output { public static void main(String args[]) { int array[] = new int[] {0 , 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; int num = 10; num = array[array[num] / 2]; System.out.println(array[num] / 2); } }

A. 0
B. 1
C. 2
D. 3
E. 4
Answer» D. 3
Discussion
5.

What is the output of this program?public class multidimention_arr { public static void main(String args[]) { int array[][] = new int[5][5]; array[0] = new int[1]; array[1] = new int[2]; array[2] = new int[3]; int sum = 0; for (int i = 0; i < 5; ++i) { for (int j = 0; j < i + 1; ++j) { array[i][j] = j + 1; } } for (int i = 0; i < 5; ++i) { for (int j = 0; j < i + 1; ++j) { sum = sum + array[i][j]; } } System.out.print(sum); } }

A. 25
B. 10
C. 35
D. 20
E. 30
Answer» D. 20
Discussion
6.

What is the output of this program?public class arr_output { public static void main(String args[]) { int arr_var [] = new int[20]; for (int j = 0; j < 20; ++j) { arr_var[j] = j; System.out.print(arr_var[j] + " "); j++; } } }

A. 0 2 4 6 8 10 12 14 16 18
B. 2 4 6 8 10 12 14 16 18
C. 2 4 6 8 10
D. 0 2 4 6 8 10
E. 0 1 2 3 4 5 6 7 8 9 10
Answer» B. 2 4 6 8 10 12 14 16 18
Discussion
7.

What is the output of below snippet?Obj[] names = new String[10];name[0] = new Integer(0);

A. ArrayIndexOutOfBoundsException
B. Compilation Error
C. Code runs successfully
D. ArrayStoreException
E. None of these
Answer» E. None of these
Discussion
8.

What will this code print?int a[] = new int [10];System.out.print(a);

A. Garbage value
B. 00000
C. value stored in arr[0].
D. 0
E. None of these
Answer» B. 00000
Discussion
9.

What is the type of variable b and d in the below snippet?int a[], b;int []c, d;

A. b and d are int
B. b is int variable; d is int array
C. d is int variable; b is int array
D. b and d are arrays of type int
E. None of these
Answer» C. d is int variable; b is int array
Discussion
10.

What is the output of this program?public class arr_output { public static void main(String args[]) { int arr_var[][] = {{ 1, 2, 3, 4}, { 4 , 5, 6, 7}, { 7, 8, 9, 10}}; int sum = 0; for (int i = 0; i < 3; ++i) { for (int j = 0; j < 3 ; ++j) { sum = sum + arr_var[i][j]; } } System.out.print(sum / 2); } }

A. 10
B. 15
C. 20
D. 22
E. 12
Answer» E. 12
Discussion
11.

What is the output of this program?public class Result { public static void main(String args[]) { boolean p = false; boolean q = true; boolean r = q ^ p; System.out.println(!r); } }

A. false
B. 0
C. 1
D. true
E. None of these
Answer» B. 0
Discussion
12.

What is the output of this program?public class Result { public static void main(String args[]) { int p , q = 2; p = 20; if (p != 20 && p / 0 == 0) { System.out.println(q); } else { System.out.println(++q); } } }

A. 1
B. 2
C. 3
D. 4
E. 5
Answer» D. 4
Discussion
13.

What is the output of this program?public class Result { public static void main(String args[]) { int a[] = {5, 6, 7, 9, 11}; for ( int k = 0; k < a.length - 1; ++k) System.out.print(a[k] + " "); } }

A. 6 7 9 11
B. 5 6 7 9
C. 1 2 3 4
D. 5 6 7 8
E. None of these
Answer» C. 1 2 3 4
Discussion
14.

What is the output of this program?public class Result { public static void main(String args[]) { int array1[] = new int[8]; int array2[] = {5, 8, 7, 6, 9}; System.out.println(array1.length + " " + array2.length); } }

A. 9 5
B. 5 9
C. 8 5
D. 5 8
E. None of these
Answer» D. 5 8
Discussion
15.

What is the output of this program?import java.util.*; public class ArrayExample { public static void main(String args[]) { int arr[] = new int [10]; for (int i = 10; i > 0; i--) arr[10 - i] = i; Arrays.sort(arr); System.out.print(Arrays.binarySearch(arr, 6)); } }

A. 1
B. 2
C. 3
D. 4
E. 5
Answer» F.
Discussion
16.

What is the output of this program?import java.util.*; public class ArrayExample { public static void main(String args[]) { int arr[] = new int [5]; for (int k = 5; k > 0; k--) arr[5 - k] = k; Arrays.sort(arr); for (int k = 0; k < 5; ++k) System.out.print(arr[k]);; } }

A. 12345
B. 54321
C. 21345
D. 1345
E. 1234
Answer» B. 54321
Discussion
17.

What is the output of this program?import java.util.*; public class ArraylistExample { public static void main(String args[]) { ArrayList object0 = new ArrayList(); ArrayList object1 = new ArrayList(); object0.add("I"); object0.add("P"); object1.add("I"); object1.add(1, "P"); System.out.println(object0.equals(object1)); } }

A. I
B. P
C. L
D. False
E. True
Answer» F.
Discussion
18.

Generics does not work with?

A. List
B. Tree
C. Array
D. set
E. None of these
Answer» D. set
Discussion
19.

What is the type of variable b and d in the below snippet?

A. b and d are int
B. b is int variable; d is int array
C. d is int variable; b is int array
D. b and d are arrays of type int
E. None of these
Answer» C. d is int variable; b is int array
Discussion
20.

What will this code print?

A. [I@2a139a55
B. Runtime Error
C. 0 0 0 0 0 0 0
D. Compilation error
E. None of these
Answer» B. Runtime Error
Discussion