@Async for async methods in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable asynchronous execution of the method.

Spring Boot

@[1]
public void sendEmail() {
    // email sending logic
}

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

ATransactional

BAsync

CService

DComponent

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Transactional instead of @Async

Forgetting to enable async support in configuration

The @Async annotation marks the method to run asynchronously in Spring Boot.

2fill in blank

medium

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

Spring Boot

@Configuration
@Enable[1]
public class AsyncConfig {
}

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

AScheduling

BTransactionManagement

CCaching

DAsync

Attempts:

3 left

💡 Hint

Common Mistakes

Using @EnableScheduling instead of @EnableAsync

Not adding this annotation causes @Async to be ignored

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

3fill in blank

hard

Fix the error in the async method declaration to return a Future result.

Spring Boot

@Async
public [1]<String> processData() {
    // processing logic
    return new AsyncResult<>("done");
}

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

AFuture

BCompletableFuture

CListenableFuture

DCallable

Attempts:

3 left

💡 Hint

Common Mistakes

Returning void when a Future is expected

Using incompatible return types like Callable

The method should return java.util.concurrent.Future to work with @Async and AsyncResult.

4fill in blank

hard

Fill both blanks to correctly configure a custom executor for async methods.

Spring Boot

@Bean
public Executor [1]() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(5);
    executor.setMaxPoolSize(10);
    executor.setQueueCapacity(25);
    executor.initialize();
    return [2];
}

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

AtaskExecutor

Bexecutor

CasyncExecutor

DthreadPool

Attempts:

3 left

💡 Hint

Common Mistakes

Returning a different variable name than created

Using inconsistent method names

The method name is taskExecutor and the returned object is executor.

5fill in blank

hard

Fill all three blanks to correctly annotate and configure async method with custom executor.

Spring Boot

@Async([1])
public void runTask() {
    // task logic
}

@Bean
public Executor [2]() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(3);
    executor.setMaxPoolSize(6);
    executor.setQueueCapacity(10);
    executor.initialize();
    return [3];
}

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

A"taskExecutor"

BtaskExecutor

Cexecutor

DcustomExecutor

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names instead of string in @Async

Mismatching bean method name and returned variable

The @Async annotation references the executor bean name as a string, the bean method is named taskExecutor, and the returned variable is executor.