The Event Aggregator
A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
Given a list of event dicts (each with 'timestamp' and 'value') and an integer bucket_width, group events into buckets where each bucket covers timestamps in [bucket_start, bucket_start + bucket_width). For each bucket with at least one event, return a dict with 'bucket_start', 'count', 'total' (sum of values). Sort the output by bucket_start ascending.
Summary
Bucket a firehose of events into tidy time windows.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision