Java Array MCQs with answers Page - 5

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Q. Which of the following statements about Java arrays is FALSE?

  • (A) Arrays can store primitive types
  • (B) Arrays can store objects
  • (C) Arrays can change size after creation
  • (D) Arrays are indexed from 0

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Q. How do you create an array of 5 Strings?

  • (A) String arr[] = new String[5];
  • (B) String arr = new String[5];
  • (C) String[] arr = new String();
  • (D) String[] arr = String[5];

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Q. Which method converts an array to a string representation?

  • (A) Arrays.toString()
  • (B) array.toText()
  • (C) String.valueOf()
  • (D) toString() directly on array

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Q. What is the result of accessing an uninitialized index in a String array?

  • (A) null
  • (B) 0
  • (C) undefined
  • (D) Compile-time error

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Q. What does this code print?
int[] arr = {1,2,3};
System.out.println(arr);

  • (A) 1 2 3
  • (B) [1, 2, 3]
  • (C) Class name and hashcode
  • (D) Error

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Q. Which statement is used to copy arrays?

  • (A) array.copy()
  • (B) System.arraycopy()
  • (C) Arrays.clone()
  • (D) array.duplicate()

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Q. What will this code output?
char[] ch = {'A','B','C'};
System.out.print(ch[1]);

  • (A) A
  • (B) B
  • (C) C
  • (D) Index out of bounds

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Q. What is the default value of elements in a float array?

  • (A) 0
  • (B) 0.0
  • (C) null
  • (D) NaN

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Q. What does this print?
int[] a = new int[]{1, 2};
System.out.println(a.length);

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 0

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Q. Which of the following is true about array declaration?

  • (A) int arr = new int[];
  • (B) int[] arr = new int[0];
  • (C) int arr[0] = new int[];
  • (D) int arr = [10];

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