[Solved] What will be the output of this Java code?int[] arr = new int[3]; arr[0] = 10; arr[1] = 20; System.out.println(arr[2]); | Java

Java - Arrays

What will be the output of this Java code?

int[] arr = new int[3];
arr[0] = 10;
arr[1] = 20;
System.out.println(arr[2]);

A0

B10

C20

DError

Step-by-Step Solution

Solution:

Step 1: Understand default values in int arrays
When an int array is created, all elements are initialized to 0 by default.
Step 2: Check assigned values and output
arr[0] and arr[1] are set, but arr[2] is not assigned, so it remains 0.
Final Answer:
0 -> Option A
Quick Check:
Unassigned int array element = 0 = C [OK]

Quick Trick: Unassigned int array elements default to 0 [OK]

Common Mistakes:

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