Question library
Questions from real interviews. Drill any of them by voice in a couple of minutes, with an interviewer, a score and feedback.
A FastAPI service started responding with delays of several seconds under load, even though the CPU is barely used. The endpoints are declared with async def. How would you find the cause?Mid-levelA user reports a bug in production, but you can't reproduce it. What do you do?Mid-levelAfter a release, the API's 99th percentile response time went from 200 milliseconds to two seconds, while the average barely changed. How would you track down the cause?Mid-levelIn production, a service crashes with an OutOfMemoryError every couple of days. How would you go about finding the cause?Mid-level