Java Array MCQs with answers Page - 3

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Q. Which of the following statements is used to create an array of 10 integers?

  • (A) int[10] arr = new int[];
  • (B) int arr = new int[10];
  • (C) int arr[] = new int[10];
  • (D) int arr = int[10];

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Q. What is the default value of elements in an array of objects?

  • (A) 0
  • (B) null
  • (C) empty string
  • (D) depends on the object

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Q. Which method is used to sort an array in Java?

  • (A) Collections.sort()
  • (B) Arrays.sort()
  • (C) array.sort()
  • (D) Sort.array()

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Q. What is the result of this code?
int[] arr = {10, 20, 30};
System.out.println(arr.length);

  • (A) 2
  • (B) 3
  • (C) 10
  • (D) Compile-time error

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Q. What is true about an array declared as `int[] a = null;`?

  • (A) It is an empty array
  • (B) It has size 0
  • (C) It has not been initialized
  • (D) It contains only 0s

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Q. How to access the last element of an array 'arr'?

  • (A) arr[arr.length]
  • (B) arr[arr.length - 1]
  • (C) arr[length(arr)]
  • (D) arr[-1]

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Q. What is printed?
int[] arr = new int[4];
System.out.print(arr[3]);

  • (A) 3
  • (B) 0
  • (C) null
  • (D) undefined

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Q. Which of the following can store both primitives and objects?

  • (A) int[]
  • (B) Object[]
  • (C) float[]
  • (D) boolean[]

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Q. What will happen if you try to access arr[-1]?

  • (A) Returns first element
  • (B) Returns last element
  • (C) Throws ArrayIndexOutOfBoundsException
  • (D) Returns null

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Q. Which of the following declares and initializes an array correctly?

  • (A) int arr[] = (1,2,3);
  • (B) int arr[] = new int[3]{1,2,3};
  • (C) int arr[] = {1, 2, 3};
  • (D) array arr = [1,2,3];

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