Two Hundred Million Redirects
A medium Pipeline Design mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Pipeline Design
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
Our link shortener does about 200 million redirects a day. Every redirect fires a click event and we need to serve two consumers from that stream: a real-time dashboard that shows per-link clicks within the last hour, and a nightly batch aggregate that powers the analytics API for date-range queries. Traffic is very spiky and some links go viral. Design the pipeline.
Summary
Billions of clicks. One tiny code. Two very different clocks.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your pipeline design solution with real code execution
- Get instant feedback and a hire/no-hire decision