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

Amazon·Frontend Engineer·Sep 2026
Technical ScreenRejectedmedium

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

Published

Curated and edited by PracHub

Practice the questions from this interview

Find the deepest shared ancestor of two keys in a binary search tree
Maximize the number of binary strings chosen under zero and one budgets

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Interview at a glance

Company
Amazon
Role
Frontend Engineer
Rounds
Technical Screen
Outcome
Rejected
Difficulty
medium
Interview date
Sep 2026
Questions from this interview
2 questions

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