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Amazon Frontend Engineer (SDE I) Interview Experience — One DSA Round, Two Mediums, Rejected

RejectedTech screenInterviewed 2026-09

I applied through a LinkedIn post for SDE I (Frontend). HR contacted me over a call and we discussed the further rounds. Round 1 (PS-DS Round) (1hr) Two DSA medium questions were asked, and I was able to solve both of them within the time limit (~40 mins). The interviewer was helpful and provided hints. Q1. Lowest Common Ancestor of a Binary Search Tree Q2. Ones and Zeroes Explain brute force, th…

I applied through a LinkedIn post for SDE I (Frontend). HR contacted me over a call and we discussed the further rounds.

Round 1 (PS-DS Round) (1hr)

Two DSA medium questions were asked, and I was able to solve both of them within the time limit (~40 mins). The interviewer was helpful and provided hints.

Q1. Lowest Common Ancestor of a Binary Search Tree

Q2. Ones and Zeroes

Explain brute force, then optimise, and also be ready to explain TC & SC of your solutions.

Verdict: Rejected

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