Out of Nowhere
A hard 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
- hard
- Seniority
- L6
Interview Prompt
Flag every reading that sits more than `threshold` standard deviations from the mean of the `window` readings just before it, reporting its baseline mean, standard deviation and z-score. Our monitoring service sends `data` as `(timestamp, value)` pairs in time order.
Summary
Every stream has a rhythm. Find the readings that break it.
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