AWS Certified Solutions Architect Associate SAA-C03 Practice Question

Implementing Amazon ElastiCache with Redis allows the application to cache frequently accessed data in memory, significantly reducing the number of reads from the database and improving performance. This is a cost-effective solution because it offloads repetitive queries to a fast, in-memory data store without the need to scale the database resources. Increasing the size of the database instance as well as enabling read replicas can improve performance but at the expense of additional cost and complexity due to more resources being involved. Using a content delivery network (CDN) is not suitable for caching database responses, as it is designed for content delivery of static and dynamic web content, rather than database query output.