Your service calls another service over the network. What problems can come up, and how do you deal with them?
~4 min by voice
How to approach it
This checks whether the candidate understands that the network is unreliable and slow, and knows the basic defenses: timeouts, retries with backoff, idempotency, a circuit breaker, a fallback and monitoring. The key subtlety is that on a timeout you don't know whether the operation went through.
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.