Smallest Missing Positive – DSA Problem Asked at Google & Amazon!

💡 Smallest Missing Positive Integer – Coding Interview Classic!
In this video, we solve one of the most common and tricky DSA problems: finding the smallest missing positive number in an unsorted array.

This question tests your ability to think beyond brute force and solve in O(n) time and O(1) space – a pattern frequently used in Google, Amazon, Microsoft, and other Big Tech interviews.

✅ What You'll Learn:

Why sorting or using hash sets won’t cut it in top-tier interviews

The index marking trick that helps solve this in linear time

Real-world interview insights and how to explain your approach clearly

A clean and optimal Python implementation

🎯 Perfect For:

Software engineers preparing for coding rounds

DSA beginners and intermediates

Anyone targeting FAANG, startups, or product-based companies

🧠 Difficulty: Medium to Hard
💻 Language: Python (with clear walkthrough)

🚀 Whether you're prepping for LeetCode hard problems or just want to crack that dream tech job, this is a must-master problem.

💬 Drop your approach in the comments,
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