Java Array MCQs with answers Page - 6

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Q. How to find the largest element in an array?

  • (A) Use Arrays.max()
  • (B) Use array.sort()
  • (C) Use a loop and compare
  • (D) Use array.max()

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Q. What is the time complexity to access an array element by index?

  • (A) O(n)
  • (B) O(log n)
  • (C) O(1)
  • (D) O(n log n)

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Q. Which of these supports dynamic resizing?

  • (A) Array
  • (B) ArrayList
  • (C) String[]
  • (D) int[]

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Q. Which loop is used to access each element without index in an array?

  • (A) for-each
  • (B) while
  • (C) do-while
  • (D) standard for loop

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Q. Which of the following is the correct syntax to declare and initialize a 2D array?

  • (A) int arr[][] = {{1,2},{3,4}};
  • (B) int[][] arr = new int[2,2];
  • (C) int[][] arr = [2][2];
  • (D) int arr = new int[2][2] = {{1,2},{3,4}};

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Q. Which keyword is used to create a new array object in memory?

  • (A) create
  • (B) array
  • (C) new
  • (D) allocate

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Q. How to clone an array in Java?

  • (A) arr.duplicate()
  • (B) arr.clone()
  • (C) Arrays.copy(arr)
  • (D) arr.copy()

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Q. Which of the following is a rectangular 2D array?

  • (A) new int[3][]
  • (B) new int[3][4]
  • (C) new int[][]{{1},{2,3}}
  • (D) int[][] = {{}}

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Q. Can array variables be reassigned to a different array?

  • (A) No, it's not allowed
  • (B) Yes, if the size is same
  • (C) Yes, regardless of size
  • (D) Only inside constructors

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

  • (A) 2
  • (B) 3
  • (C) 5
  • (D) 6

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