Software Engineer · Online Assessment · Coding

Confluent — Software Engineer

Level: Junior-Level

Round: Online Assessment · Type: Coding · Difficulty: 6/10 · Duration: 60 min · Interviewer: Neutral

Topics: Sorting, Data Structures

Location: San Francisco Bay Area

Interview date: 2025-11-15

Summary

I had one coding question in my online assessment.

Details

The coding question I got was:

Given n users and m songs, each user i has a preference list pref[i] (containing a permutation of all song numbers from 0 to m-1).

Rules:

1. If a < b, user i prefers a.
2. Song x beats y: when more than half of the users prefer x, or exactly half of the users prefer x and x's number is smaller than y.
3. Song x is more popular than y: when x beats more songs than y, or equal and x's number is smaller.

Return the ranking of each song by popularity.