Where the Hours Go
A medium Spark 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
- Spark
- Difficulty
- medium
- Seniority
- mid
Interview Prompt
We're measuring where our streaming viewers' time actually goes. Total the seconds watched in `user_sessions` by the kind of device each session was on, as recorded in `devices`, which is small enough to broadcast instead of shuffling the sessions.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your Spark code against the tables
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision