[Solved] Find the error in this Java code snippet:int[] arr; arr[0] = 5; — Ans: arr is declared but not initialized, causes NullPointerException | Java

Java - Arrays

Find the error in this Java code snippet:

int[] arr;
arr[0] = 5;

ASyntax error: missing array size in declaration

Barr is declared but not initialized, causes NullPointerException

CArrayIndexOutOfBoundsException because array is empty

DNo error, code runs fine

Step-by-Step Solution

Solution:

Step 1: Check array declaration and initialization
arr is declared but not initialized with new, so it points to null.
Step 2: Analyze assignment to arr[0]
Assigning to arr[0] causes NullPointerException because arr is null.
Final Answer:
arr is declared but not initialized, causes NullPointerException -> Option B
Quick Check:
Arrays must be initialized before use [OK]

Quick Trick: Always initialize arrays before accessing elements [OK]

Common Mistakes:

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