Exams / CLF-C02 / Databases and migration / Question 1
CLF-C02 practice question: Databases and migration (1 of 2)
Cloud Technology and Services A free question from our original CLF-C02 practice exam. Try it, then open the answer to see why each option is right or wrong.
An online shop's product pages read the same data from its Amazon RDS database thousands of times a minute. The company wants to keep frequently read data in memory to answer requests faster and reduce the load on the database. Which service should it add?
Choose one answer.
- AA. Amazon ElastiCache
- BB. Amazon Redshift
- CC. Amazon S3 Glacier Deep Archive
- DD. AWS Database Migration Service
Show the answer and explanation
Answer: A
- A. Right: Correct. ElastiCache is a managed in-memory cache that can sit in front of a database to serve frequently read data quickly.
- B. Wrong: Redshift is a data warehouse for analytics. It is not designed as a fast cache for a website's database.
- C. Wrong: Deep Archive is the lowest-cost storage for rarely accessed archives, with retrieval measured in hours.
- D. Wrong: DMS moves data between databases. It does not cache data to speed up reads.
Explanation
Amazon ElastiCache is a managed in-memory data store and cache supporting Valkey, Redis OSS and Memcached. Keeping frequently read data in memory returns it faster than querying the database each time and reduces the load on the database, which can also allow a smaller database instance.
Study
Keep practising
Answer questions with a score at the end, or practise just this topic with the explanation after each one. No sign-up needed.