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Which service is best for storing common database query results, which helps to alleviate database access load?
A. Amazon Machine Learning
B. Amazon SQS
C. Amazon ElastiCache
D. Amazon EC2 Instance Store
Correct Answer: C
Explanation/Reference:
Explanation:
Amazon ElastiCache for Redis is a great choice for implementing a highly available, distributed, and secure in-memory cache to decrease access latency, increase throughput, and ease the load off your relational or NoSQL databases and applications. ElastiCache can serve frequently requested items at submillisecond response times, and enables you to easily scale for higher loads without growing the costlier backend databases. Database query results caching, persistent session caching, and full-page caching are all popular examples of caching with ElastiCache for Redis.
Reference: https://aws.amazon.com/products/databases/real-time-apps-elasticache-for-redis/
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