AI Research Scientist · Online Assessment · Coding

Amazon — AI Research Scientist ✅ Passed

Level: Intern

Round: Online Assessment · Type: Coding · Difficulty: 4/10 · Duration: 60 min · Interviewer: Neutral

Topics: String Manipulation, Arrays

Location: Seattle, WA, US

Interview date: 2026-01-14

Summary

The online assessment consisted of two coding questions:

Question: Find the first non-repeating character in a string.

Question: Divide an array into the fewest groups such that the difference between any two elements in each group does not exceed a given maxdiff value.

Details

The coding questions I encountered were:

1. Find the first non-repeating character in a given string.
2. Given an array, divide it into the minimum number of groups such that for each group, the absolute difference between any two elements is no more than maxdiff.