L5 Enterprise ai_coding

A medium ai_coding mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain

ai_coding

Difficulty

medium

Seniority

L5

Interview Prompt

Our orders enrichment consumer reprocesses ~4M messages every time we deploy. The team added enable_auto_commit=False and explicit commit() calls weeks ago, so this should have stopped. Run tests/test_offsets_persist.py to reproduce. The reprocess window correlates with rebalance events. Find why the explicit commits aren't sticking and fix it. Bonus credit: explain what 'cooperative-sticky' would have changed.

Summary

It happened. It happened again.

How This Interview Works

1. Read the vague prompt (just like a real interview)
2. Ask clarifying questions to the AI interviewer
3. Write your ai_coding solution with real code execution
4. Get instant feedback and a hire/no-hire decision