Why async processing matters in Spring Boot - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable asynchronous processing in a Spring Boot method.

Spring Boot

@[1]
public void processTask() {
    // task logic here
}

Drag options to blanks, or click blank then click option'

AEnableAsync

BAsync

CAsyncMethod

DAsyncProcessing

Attempts:

3 left

💡 Hint

Common Mistakes

Using @EnableAsync on a method instead of a configuration class

Misspelling the annotation name

Forgetting the '@' symbol

The @Async annotation tells Spring Boot to run this method asynchronously.

2fill in blank

medium

Complete the code to enable async support in a Spring Boot application.

Spring Boot

@Configuration
@[1]
public class AsyncConfig {
}

Drag options to blanks, or click blank then click option'

AAsyncEnabled

BAsyncSupport

CAsyncConfiguration

DEnableAsync

Attempts:

3 left

💡 Hint

Common Mistakes

Placing @EnableAsync on a method instead of a configuration class

Using @Async instead of @EnableAsync here

Misspelling the annotation

The @EnableAsync annotation enables Spring's asynchronous method execution capability.

3fill in blank

hard

Fix the error in the method signature to return a future result asynchronously.

Spring Boot

@Async
public [1]<String> fetchData() {
    // fetch data logic
}

Drag options to blanks, or click blank then click option'

ACompletableFuture

BFuture

CListenableFuture

DOptional

Attempts:

3 left

💡 Hint

Common Mistakes

Using Future which is less flexible

Using Optional which is not for async

Using ListenableFuture without proper dependencies

CompletableFuture is commonly used in Spring Boot for async methods returning results.

4fill in blank

hard

Fill both blanks to create a method that runs asynchronously and returns a completed future.

Spring Boot

@Async
public CompletableFuture<String> [1]() {
    return CompletableFuture.[2]("Done");
}

Drag options to blanks, or click blank then click option'

ArunTask

BcompletedFuture

CsupplyAsync

DexecuteTask

Attempts:

3 left

💡 Hint

Common Mistakes

Using supplyAsync inside the method without executor

Choosing method names that don't describe an action

Returning incomplete futures

The method name can be runTask, and completedFuture returns a completed CompletableFuture.

5fill in blank

hard

Fill all three blanks to configure a custom executor bean for async processing.

Spring Boot

@Bean
public Executor [1]() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize([2]);
    executor.setMaxPoolSize([3]);
    executor.initialize();
    return executor;
}

Drag options to blanks, or click blank then click option'

AtaskExecutor

B5

C10

DasyncExecutor

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong bean name that conflicts with defaults

Setting core pool size larger than max pool size

Forgetting to initialize the executor

The bean name asyncExecutor is common, with core pool size 5 and max pool size 10 for thread management.