Against the Current
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
- L5
Interview Prompt
A nightly export hands you a CSV log far too large to fit in memory, delivered as an iterable that yields one line at a time with the header row first. Given a `column_name`, return the sum of that column's values.
Summary
Too big to load. Read what you can.
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