The Firehose
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 a stream of metric events, each carrying a numeric `timestamp` and a numeric `value`, into fixed-width time windows of size `bucket_width`. Collapse each window into its event `count`, the `total` of its values, and the `bucket_start` it begins at.
Summary
A stream arrives out of order. Roll it up, one time window at a time.
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