Java Array Concepts - Multiple Choice Questions (MCQs)

Multiple Choice Quiz

1:What is an array in Java?

a) A collection of unrelated elements.
b) A collection of elements of different data types
c) A collection of elements of the same data type.

2: How is the length of an array determined in Java?

a) Using the length() method.
b) Using the size() method.
c) By the length field.

3:Which of the following statements initializes an array of integers with a size of 5?

a) int numbers = new int[5];
b) int[] numbers = new int[5];
c) int[] numbers = {5};

4:How do you access the element at index 2 of an array named arr?

a) arr[2]
b) arr(2)
c) arr.get(2)

5: What will be the output of the following code snippet? int[] values = {3, 7, 2, 8}; System.out.println(values[1]);

a) 3
b) 7
c) 8

6: Which loop is commonly used to iterate through elements of an array in Java?

a) do-while loop
b) while loop
c) for-each loop

7: What is the index of the last element in an array with a length of 10?

a) 10
b) 9
c) 11

8: Which method is used to sort an array in ascending order in Java?

a) Arrays.sort()
b) Collections.sort()
c) Array.sort()

9: In Java, can the size of an array be changed once it's created?

a) Yes, using the resize() method.
b) Yes, by using the length field.
c) No, the size is fixed once an array is created.

10: What happens if you try to access an index that is out of bounds in an array?z

a) The program throws an exception at compile-time.
b) The program throws an ArrayOutOfBoundsException at runtime.
c) The program crashes and terminates abruptly.

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