The Online Elite
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
A payments platform logs every transaction as online or offline and ties each to a merchant. Given the merchants and the payments, return the average of all online transaction amounts belonging to the `top_n` merchants by total online volume.
Summary
The top performers are hiding in the data.
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