Why caching matters for performance in Spring Boot - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable caching on a Spring Boot method.

Spring Boot

@Cacheable([1])
public String getData() {
    // method logic
}

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

ACacheable

BcacheManager

C@Cacheable

D"dataCache"

Attempts:

3 left

💡 Hint

Common Mistakes

Using annotation names or variables instead of a string cache name.

The @Cacheable annotation requires the name of the cache as a string parameter. Here, "dataCache" is the cache name.

2fill in blank

medium

Complete the code to add caching support in a Spring Boot application.

Spring Boot

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

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

ACacheable

BCaching

CCacheManager

DCacheConfig

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Cacheable or other cache-related annotations instead of @EnableCaching.

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

3fill in blank

hard

Fix the error in the caching annotation usage.

Spring Boot

@Cacheable(cacheNames = [1])
public String fetchData() {
    // fetch data logic
}

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

A"myCache"

BmyCache

CcacheName

Dcache

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around the cache name causing syntax errors.

The cacheNames attribute expects a string or array of strings. The cache name must be quoted.

4fill in blank

hard

Fill both blanks to create a cache configuration bean.

Spring Boot

@Bean
public CacheManager [1]() {
    return new [2]();
}

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

AcacheManager

BcacheConfig

CConcurrentMapCacheManager

DSimpleCacheManager

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names or cache manager classes.

The method name is typically cacheManager, and ConcurrentMapCacheManager is a simple cache manager implementation.

5fill in blank

hard

Fill all three blanks to create a cacheable method with a key.

Spring Boot

@Cacheable(value = [1], key = "#[2]")
public String getUserData([3] userId) {
    // method logic
}

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

A"userCache"

Bid

CString

DuserId

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong parameter names or types, or missing quotes around cache name.

The cache name is "userCache". The key uses the method parameter name userId. The parameter type is String.