Reverse an Array in One Pass 🚀 | Two Pointer Approach | Java DSA Interview Question

Publicado em: 24 Março 2026
no canal de: coder Nam

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🚀 In this video, we solve one of the most fundamental DSA interview questions:
👉 Reverse an Array using Java

We cover both approaches:
✔️ Using extra space (basic method)
✔️ Optimal in-place solution using Two Pointers (O(1) space)

💡 What you'll learn:
How to reverse an array step by step
Two pointer technique explained clearly
Dry run for better understanding
Interview tips and edge cases

📌 Problem:
Given an array, reverse it efficiently.

Example:
Input: [1, 4, 3, 2, 6, 5]
Output: [5, 6, 2, 3, 4, 1]

⚡ Time Complexity:
O(n)

⚡ Space Complexity:
O(1) (Optimal Approach)

🎯 Perfect for:
Beginners in DSA
Java learners
Placement preparation
Coding interviews

🔥 This is a must-know problem for interviews!

#DSA #Java #Arrays #CodingInterview #PlacementPreparation

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