Java Array Questions

What is the output? int[] a = {1, 2, 3, 4, 5}; System.out.println(a[a.length - 1]);

• 1

• 4

• 5 (Correct)

• Compilation error

What will happen? int[][] m = new int[2][2]; System.out.println(m[1][1]);

• 0 (Correct)

• Compilation error

• NullPointerException

• ArrayIndexOutOfBoundsException

What will be printed? int[] a = {5, 4, 3}; System.out.println(a[-1]);

• 5

• -1

• ArrayIndexOutOfBoundsException (Correct)

• Compilation error

Identify the result of the following snippet: int[][] arr = new int[2]; arr[0] = new int[2]; arr[1] = new int[3]; System.out.println(arr[1].length);

• 2

• 3 (Correct)

• 1

• Compilation error

Which is valid declaration?

• int arr[] = new int[3]; (Correct)

• int[3] arr = new int[];

• int[] arr = new int[];

• int arr = new int[3];

What is the output? int[] a = {1, 2, 3, 4, 5}; System.out.println(a[a.length - 1]);

• 1

• 4

• 5 (Correct)

• Compilation error

What is the output? int[] x = new int[]{1, 2, 3}; x = new int[]{4, 5}; System.out.println(x[1]);

• 1

• 2

• 5 (Correct)

• Compilation error

What is the output? int[] a = {1, 2, 3, 4, 5}; System.out.println(a[a.length - 1]);

• 1

• 4

• 5 (Correct)

• Compilation error

Identify the result of the following snippet: int[][] arr = new int[2]; arr[0] = new int[2]; arr[1] = new int[3]; System.out.println(arr[1].length);

• 2

• 3 (Correct)

• 1

• Compilation error

What is the output? int[] x = new int[]{1, 2, 3}; x = new int[]{4, 5}; System.out.println(x[1]);

• 1

• 2

• 5 (Correct)

• Compilation error