Towers and Phones, Same Story
A hard Pipeline Design 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
- Pipeline Design
- Difficulty
- hard
- Seniority
- L6
Interview Prompt
Our app performance reports can't tell a weak signal from a slow app, because nothing ties the 2 billion daily app events to the 400,000 towers reporting signal, handoff and coverage readings every few seconds. Design the pipeline that ingests both feeds and models them as warehouse dimensions and facts.
Summary
Tower signals meet app events. Somewhere in between is the truth.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Draw your pipeline on the design canvas: sources, transforms, storage and checks
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision