Question library
Questions from real interviews. Drill any of them by voice in a couple of minutes, with an interviewer, a score and feedback.
What's the difference between a data warehouse and a data lake?JuniorA mobile app sends about a billion events a day. Design a system for collecting and storing these events so that analysts can build reports and product dashboards update within a few minutes.Mid-levelThe company wants to move from a classic data warehouse to a lakehouse on object storage. How would you design such a platform, and what trade-offs do you see compared to a traditional DWH?Senior