The Event Window
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
Implement HitCounter with hit(timestamp) (record an event) and get_hits(timestamp) (return number of hits in the last 300 seconds up to and including timestamp, i.e., hits h with timestamp - 300 < h <= timestamp). Test harness returns None for hit and the count for get_hits.
Summary
A five-minute window is all that matters.
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