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The Impersonator
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
- senior
Interview Prompt
The streaming ingestion layer buffers events before flushing to the warehouse. The buffer must process events in arrival order (FIFO), but the only collection primitive available in the lightweight runtime is a stack. Build a queue class backed by two internal stacks that preserves first-in-first-out ordering for enqueue and dequeue operations.
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