Mock Coding Interview: Smallest Missing Positive Integer | DSA Question for FAANG

"For Program details: https://bit.ly/47WIu9t

Watch this mock interview session where a candidate tackles one of the most common yet tricky Data Structures & Algorithms (DSA) interview questions asked in top tech companies:
Find the smallest positive integer missing in an unsorted array in O(N) time and O(1) space.

In this session, you’ll see:

Different approaches proposed by the candidate (sorting, bit manipulation, etc.)

How the interviewer guides them toward the optimal solution using index-based swapping

Key insights: Why the missing integer always lies between 1 and N+1

Final implementation in Python and C++

Feedback on improving time management and interview problem-solving flow

Why this matters:
This problem is a classic FAANG favorite and appears often in coding interviews. It tests not just problem-solving skills but also handling constraints under pressure.

💡 Pro Tip from the interviewer:
Always practice arrays, linked lists, recursion, strings, searching, and sorting problems—these dominate the first round of interviews at top tech companies.

About Interview Kickstart:
Interview Kickstart helps experienced engineers master DSA, system design, and AI skills with live training from FAANG engineers. Our programs combine mock interviews, mentorship, and structured prep to help you land your dream role.

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