4.8 Knowledge Check Caching PDF

Preview

Summary

Download 4.8 Knowledge Check Caching PDF

Description

1. What is caching? A high-speed data storage layer. 2. Which types of data should you cache? Static data that is frequently accessed. 3. What is a benefit of caching? Reduced response latency. 4. What does Amazon CloudFront enable? Multi-tiered and regional caching of content. 5. How does Amazon CloudFront use edge locations? It caches frequently accessed content at edge locations. It delivers the cached content to clients through the edge location with the lowest latency to those clients. 6. Where is application session data cached when using sticky sessions? Web server. 7. Which statement best describes an efficient way to deliver on-demand streaming content by using Amazon CloudFront? A best practice is to create video segments and store them in an Amazon Simple Storage Service (Amazon S3) bucket. Then, use CloudFront to cache the segments. 8. What is Amazon DynamoDB Accelerator (DAX)? A fully managed, highly available, in-memory cache for DynamoDB. 9. How can an application use Amazon ElastiCache to improve database read performance? (2) NOT Direct all read requests to the database and configure it to read from ElastiCache when a cache miss occurs. Replicate the database in ElastiCache, and direct all reads to ElastiCache and all writes to the database. BE NOT Direct all read requests to the database and configure it to read from ElastiCache when a cache miss occurs. Write data to ElastiCache whenever the application writes to the database. BD NOT DE An application that always reads from the database first is not using the cache. The application must fetch the data from the database when a cache miss occurs. Offloading all read requests to a replica of a database is the of a read replica. 10. Which role does Amazon CloudFront play in protecting against distributed denial of service (DDoS) attacks? Routes traffic through edge locations....