A hard Pipeline Design interview practice problem on DataDriven. Write and execute real pipeline design code with instant grading.

Domain

Pipeline Design

Difficulty

hard

Seniority

L5

Problem

We run an ads platform and want to build a simulation system that matches ad inventory (slots) against ad campaigns to answer what-if questions about fill rates, reach, and frequency. Users should be able to configure a simulation, submit it, and explore the results later. A single configuration might run up to 1,000 simulations. Design the data pipeline behind this system.

Summary

A million slots. A thousand campaigns. Every combination matters.

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