Redis as cache provider in Spring Boot - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Redis and why is it used as a cache provider in Spring Boot?

Redis is an in-memory data store that is very fast. It is used as a cache provider in Spring Boot to store frequently accessed data temporarily, so the application can get data quickly without hitting the database every time.

beginner

How do you enable Redis caching in a Spring Boot application?

You add the Spring Boot starter for Redis and caching, then add @EnableCaching annotation in your main application class. This tells Spring Boot to use caching features and Redis as the cache store.

beginner

What annotation is used to cache the result of a method in Spring Boot with Redis?

The @Cacheable annotation is used on a method to tell Spring Boot to cache its result in Redis. When the method is called again with the same parameters, the cached result is returned instead of running the method again.

intermediate

What is the role of RedisTemplate in Spring Boot Redis caching?

RedisTemplate is a helper class in Spring Boot that simplifies Redis operations like saving, retrieving, and deleting cache data. It handles the connection and data serialization for you.

intermediate

How can you configure the expiration time for cached data in Redis with Spring Boot?

You can set the expiration time (TTL) for cached data by configuring the cache manager or using Redis commands. In Spring Boot, you can customize the RedisCacheManager bean to set TTL for caches so data expires after a set time.

Which annotation enables caching support in a Spring Boot application?

A @CacheEvict

B @Cacheable

C @EnableCaching

D @CachePut

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

What does the @Cacheable annotation do?

A Deletes cache entries

B Caches the result of a method

C Updates cache entries

D Disables caching

@Cacheable caches the result of a method so future calls with the same parameters return cached data.

What type of data store is Redis?

A In-memory data store

B Relational database

C File system

D NoSQL document store

Redis is an in-memory data store, which makes it very fast for caching.

Which Spring Boot class helps with Redis operations like saving and retrieving data?

A JdbcTemplate

B MongoTemplate

C CacheManager

D RedisTemplate

RedisTemplate simplifies Redis operations such as saving and retrieving cache data.

How do you set a time-to-live (TTL) for cached data in Redis with Spring Boot?

A Configuring RedisCacheManager with TTL settings

B Using @Cacheable only

C Using @EnableCaching

D Setting TTL is not possible

You configure RedisCacheManager bean to set TTL for cached data so it expires after a certain time.

Explain how Redis works as a cache provider in a Spring Boot application.

Think about why caching helps and how Redis fits in.

Describe the steps to set up Redis caching in a Spring Boot project.

Focus on dependencies, annotations, and configuration.