Redis as cache provider in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable caching in a Spring Boot application.

Spring Boot

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.[1](Application.class, args);
    }
}

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

Arun

Bstart

Cexecute

Dlaunch

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'launch' instead of 'run' causes errors.

Forgetting to call any method to start the app.

The SpringApplication.run() method starts the Spring Boot application.

2fill in blank

medium

Complete the annotation to enable caching support in Spring Boot.

Spring Boot

@Configuration
[1]
public class CacheConfig {
}

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

A@EnableScheduling

B@EnableTransactionManagement

C@EnableAsync

D@EnableCaching

Attempts:

3 left

💡 Hint

Common Mistakes

Using @EnableScheduling or other unrelated annotations.

Forgetting to add any caching annotation.

The @EnableCaching annotation activates Spring's annotation-driven cache management capability.

3fill in blank

hard

Fix the error in the Redis cache manager bean definition.

Spring Boot

@Bean
public RedisCacheManager cacheManager(RedisConnectionFactory factory) {
    return RedisCacheManager.[1](factory).build();
}

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

Abuilder

BBuilder

Ccreate

DbuilderFactory

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'create' or 'Builder' causes compilation errors.

Using incorrect method names for builder pattern.

RedisCacheManager.builder(factory) returns a builder to configure and build the cache manager.

4fill in blank

hard

Fill both blanks to configure a RedisTemplate bean with String keys and values.

Spring Boot

@Bean
public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
    RedisTemplate<String, String> template = new RedisTemplate<>();
    template.setConnectionFactory([1]);
    template.setKeySerializer([2]);
    return template;
}

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

Afactory

Bnew StringRedisSerializer()

Cnew GenericJackson2JsonRedisSerializer()

DconnectionFactory

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong serializer for keys causes data issues.

Passing wrong variable name for connection factory.

The RedisTemplate needs the RedisConnectionFactory to connect and a StringRedisSerializer to serialize keys as strings.

5fill in blank

hard

Fill both blanks to create a cacheable service method with Redis cache.

Spring Boot

public class UserService {

    @Cacheable(cacheNames = [1])
    public User getUserById([2] id) {
        // fetch user from database
        return userRepository.findById(id);
    }
}

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

A"users"

BLong

Cint

D"userCache"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong cache name string or missing quotes.

Using wrong parameter type like int instead of Long.

The @Cacheable annotation requires a cache name string like 'userCache'. The method parameter type for id is Long.