Google Coding Interview With a Meta Software Engineer

Published: 18 February 2026
on channel: Sajjaad Khader

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In this video, I host a real mock coding interview with a former Meta software engineer using an actual question asked at Google and Meta.

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TIMESTAMPS

0:00 - Intro
0:39 - Mock interview begins
1:04 - The actual Meta/Google interview question
1:36 - What makes a parenthesis string valid?
2:25 - Initial approach & intuition
3:42 - Identifying edge cases
4:08 - Why we need a stack
5:14 - Step-by-step dry run example
7:05 - Time & space complexity breakdown
8:32 - Coding the solution in JavaScript
10:54 - Why triple equals (===) matters
12:51 - Handling invalid closing parentheses
14:14 - Fixing dangling opening parentheses
16:41 - Returning the final string
18:08 - Testing edge cases
20:01 - Multiple valid outputs explained

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