The Custom Iterator
A medium 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
- medium
- Seniority
- L4
Interview Prompt
Our `Range` objects get walked more than once. Build `Range` as its own iterator, taking the built-in's one, two and three argument forms, then have `run_operations` replay `operations` against the matching `arguments`: "Range" builds a new instance and records `None`, and "iterate" records every value the most recent instance yields.
Summary
Some sequences follow their own rules.
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