DSA Day 83: Technical Interview Strategy & Coding Approach

📅 Date: July 14, 2026

🧠 Mood: The Strategist ♟️

🔥 Topic: DSA Day 83: Technical Interview Strategy & Coding Approach

🎯 How to Survive the Whiteboard

If you jump straight into writing C++ code the moment an interviewer gives you a problem, you will fail. The most valuable video in today's curriculum wasn't about math; it was a pure strategic guide titled "How to approach Coding Qs?".

Technical interviews evaluate your thought process, not just your syntax.

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🗺️ The 4-Step Interview Framework

1. Clarify: Never assume. Ask about edge cases. "Can the array be empty?" "Are there negative numbers?"
2. The Brute Force: Verbally explain the naive $O(N^2)$ approach first. It proves you can at least solve the problem, and gives you a baseline to improve upon.
3. Optimize: Use Data Structures (like Hash Maps) or Algorithms (like Binary Search) to reduce the time complexity. State the new Big O notation out loud.
4. Code & Dry Run: Only write code once the logic is agreed upon. Afterward, manually trace a small test case through your variables to catch off-by-one errors.