Questions 19 to 21

Explanations for questions 19 to 21

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Question 19

The database layer of an on-premises web application is being migrated to AWS. The database uses a multi-threaded, in-memory caching layer to improve performance for repeated queries. Which service would be the most suitable replacement for the database cache?

  1. Amazon ElastiCache Redis
  2. Amazon DynamoDB DAX
  3. Amazon ElastiCache Memcached
  4. Amazon RDS MySQL

Correct Answer: 3

Explanation: Amazon ElastiCache with the Memcached engine is an in-memory database that can be used as a database caching layer. The Memcached engine supports multiple cores and threads and large nodes.

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