How would you combine concatMap and exhaustMap to process a queue of tasks but skip new tasks if one is running?

hard📝 component behavior Q9 of 15

Angular - RxJS Operators

How would you combine concatMap and exhaustMap to process a queue of tasks but skip new tasks if one is running?

AUse exhaustMap inside concatMap to queue and skip tasks

BUse concatMap inside exhaustMap to queue tasks and ignore new while active

CUse mergeMap inside exhaustMap to run all tasks concurrently

DUse switchMap inside concatMap to cancel queued tasks

Step-by-Step Solution

Solution:

Step 1: Understand desired behavior
Queue tasks but skip new tasks if one is running.
Step 2: Analyze operator nesting
Using concatMap inside exhaustMap means exhaustMap controls ignoring new tasks while active, concatMap queues tasks inside.
Final Answer:
Use concatMap inside exhaustMap to queue tasks and ignore new while active -> Option B
Quick Check:
exhaustMap outer ignores new, concatMap inner queues [OK]

Quick Trick: Nest concatMap inside exhaustMap for queue with skip [OK]

Common Mistakes:

MISTAKES

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