Where the Hours Go
A medium Spark mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Spark
- Difficulty
- medium
- Seniority
- mid
Interview Prompt
We run a streaming platform and want to know where our viewers actually spend their time, counting the seconds of every session they open. Break that total down by the kind of device they watch on, most time first.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your spark solution with real code execution
- Get instant feedback and a hire/no-hire decision