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Data Engineer · Mid-level · System design

The business complains that the numbers in dashboards regularly turn out to be wrong, and they find out about it from users. Design a data quality control system for the data warehouse.

~10 min by voice

How to approach it

The interviewer wants to see whether you can build a system that finds data problems before users do: which quality dimensions to monitor, where to put the checks, what to do when they fail, and who is responsible for fixing things. What matters is not a list of tests but the process around them.

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data qualitymonitoring
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Answer by voice

The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.

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Best with headphones · ~10 min