Where the Numbers Settle
A easy Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- easy
- Seniority
- L5
Interview Prompt
You're building a StreamAverager that ingests sensor readings one at a time: add(key, value) records a reading under a key, and get_averages() returns the mean of the values seen so far for each key. A driver run_stream_averager(operations) creates one StreamAverager, replays a list of ['add', key, value] and ['get_averages'] operations in order on it, and returns a parallel list of results, one per operation.
Summary
The answer moves with the data.
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