AWS Certified Cloud Practitioner 云从业者考试考题3

题目

A popular mobile game uses CloudFront, Lambda, and DynamoDB for its backend services. The player data is persisted on a DynamoDB table and the static assets are distributed by CloudFront. However, there are a lot of complaints that saving and retrieving player information is taking a lot of time. To improve the game’s performance, which AWS service can you use to reduce DynamoDB response times from milliseconds to microseconds?

A. AWS ElastiCache Memcached
B. Amazon Simple Storage Service
C. Amazon EC2 Instance Storage
D. Amazon DynamoDB NextGen
E. Amazon DynamoDB Accelerator (DAX)

答案

E. Amazon DynamoDB Accelerator (DAX)

Amazon DynamoDB 加速器(DAX) 是一种完全托管、高可用性的内存中缓存, 可以将 Amazon DynamoDB 的响应时间从毫秒缩短到微秒, 即使每秒请求数以百万计。
选项4是不正确的, 因为并没有亚马逊 DynamoDB NextGen这样的东西存在。
选项1、2和3不正确, 因为它们都不能减少 Amazon DynamoDB 响应时间。