Frontend Engineer · Phone Screen · Multiple Types

Amazon — Frontend Engineer ✅ Passed

Level: Junior-Level

Round: Phone Screen · Type: Multiple Types · Difficulty: 5/10 · Duration: 60 min · Interviewer: Neutral

Topics: React, Algorithms, Behavioral Questions, Accessibility

Location: Seattle, WA, US

Interview date: 2025-12-01

Summary

Round 1: Behavioral (BQ)

Question: I was asked two general behavioral questions for about 15 minutes.

Round 2: Coding

Question: Display 10 boxes in React, then handle scaling and accessibility for 100 boxes. Also, find the failure time from an array of logs using a linear time approach. I mentioned binary search but ran out of time to discuss edge cases.

Details

The React question involved displaying 10 boxes on a page, each with a length and width of 100 pixels. I was instructed to use display: flex and flex-wrap to ensure proper wrapping.

Follow-up questions:

1. How to scale if we have 100 boxes? (pagination, infinite scrolling)
2. If pagination is used, how to make the page accessible? (a11y)

The algorithm question involved an array of logs, where each log contains a status and a timestamp. After a failure occurs, all subsequent logs are marked as failed. The task was to find the starting time of the failure.

I suggested iterating from the back, resulting in a linear time complexity. I briefly mentioned binary search but didn't have time to discuss constraints or edge cases.