You want to improve a Spring Boot app's responsiveness by running multiple independent tasks in parallel. Which approach best uses async processing to achieve this?

hard📝 Application Q15 of 15

Spring Boot - Async Processing

ARun all tasks sequentially in the main thread to avoid thread overhead.

BAnnotate each task method with @Async and return CompletableFuture, then combine results with CompletableFuture.allOf().

CUse @Async but return void from all methods to simplify code.

DCreate new threads manually inside each method without @Async.

Step-by-Step Solution

Solution:

Step 1: Identify best async pattern for parallel tasks
Using @Async with CompletableFuture allows tasks to run in parallel and return results.
Step 2: Combine results properly
CompletableFuture.allOf() waits for all async tasks to finish, enabling coordinated processing.
Final Answer:
Annotate each task method with @Async and return CompletableFuture, then combine results with CompletableFuture.allOf(). -> Option B
Quick Check:
Parallel async tasks + combine results = A [OK]

Quick Trick: Use @Async + CompletableFuture.allOf() for parallel task coordination [OK]

Common Mistakes:

Running tasks sequentially loses async benefits
Returning void loses ability to track task completion
Manually creating threads ignores Spring Boot async support

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More Spring Boot Quizzes

You want to improve a Spring Boot app's responsiveness by running multiple independent tasks in parallel. Which approach best uses async processing to achieve this?

Step 1: Identify best async pattern for parallel tasks

Step 2: Combine results properly

Final Answer:

Quick Check:

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