Before the Batch Is Lost
A hard 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
- hard
- Seniority
- senior
Interview Prompt
We run bottling and canning lines across a few hundred breweries, and every line streams sensor readings (fill level, temperature, capper torque) at about 4 billion events a day, some of them stuck at a constant value or spraying out-of-range garbage. Plant operators need to catch a line drifting out of spec within seconds so they can stop it before a whole batch is scrapped, while supply chain needs an exact daily count of good units produced per SKU that reconciles for finance, and a stuck or garbage reading can neither halt the line monitors nor corrupt that count. Many plants have flaky connectivity, so readings arrive late and out of order, and the daily numbers still have to include them.
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