Footprints in the Feed
A medium Python mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- Python
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
You're rolling up raw feed-handler log lines in `lines`, each a CSV row of `date,process,host,log_message,bytes`. Total the bytes per day and per exchange within each day, and return both rollups together, the per-day totals first.
Summary
Every trade left a footprint.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your Python against test cases
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision