The Hourly Bucket
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 'ts' in ISO format 'YYYY-MM-DDTHH:MM:SS' and 'type'), group by the hour prefix 'YYYY-MM-DDTHH' (first 13 characters of ts). Return a dict mapping each hour prefix to a list of 'type' values in original order.
Summary
Timestamps belong somewhere.
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