Angular · Middle · Question 16 of 75
What is mergeMap best for?
- ✓Correct answer: Running independent inner requests in parallel (optionally with a concurrency limit)
- 2Cancelling the previous request
- 3Ignoring values while a request is in progress
Explanation
mergeMap subscribes to every inner Observable immediately; results arrive in completion order. Its second argument limits concurrency, e.g. mergeMap(upload, 3).