Practice Test 2 | AWS Certified Solutions Architect Associate | SAA-C03 | Dumps | Mock Test

Answer – C and D

AWS Documentation mentions the following:

Amazon ElastiCache offers fully managed Redis and Memcached. Seamlessly deploy, operate, and scale popular open source compatible in-memory data stores. Build data-intensive apps or improve the performance of your existing apps by retrieving data from high throughput and low latency in-memory data stores. Amazon ElastiCache is a popular choice for Gaming, Ad-Tech, Financial Services, Healthcare, and IoT apps.

For more information on ElastiCache, please refer to the URL below.

https://aws.amazon.com/elasticache/

Option A is incorrect. RDS is a distributed relational database. It is a web service running “in the cloud” designed to simplify the setup, operation, and scaling of a relational database for use in applications.

Option B is incorrect. SQS is a fully managed message queuing service that makes it easy to decouple and scale microservices, distributed systems, and serverless applications.

Option C is correct.

Consider only storing a unique session identifier in an HTTP cookie and storing more detailed user session information on the server side. Most programming platforms provide a native session management mechanism that works this way. However, user session information is often stored on the local file system by default and results in a stateful architecture. A common solution to this problem is to store this information in a database. Amazon DynamoDB is a great choice because of its scalability, high availability, and durability characteristics. For many platforms, there are open source drop-in replacement libraries that allow you to store native sessions in Amazon DynamoDB.4

https://d1.awsstatic.com/whitepapers/AWS_Cloud_Best_Practices.pdf

AWS best practices white paper – Page:8

Note:

In order to address scalability and to provide a shared data storage for sessions that can be accessible from any individual web server, you can abstract the HTTP sessions from the web servers themselves. A common solution to for this is to leverage an In-Memory Key/Value store such as Redis and Memcached.

In-memory caching improves application performance by storing frequently accessed data items in memory, so that they can be retrieved without access to the primary data store. Properly leveraging caching can result in an application that not only performs better, but also costs less at scale. Amazon ElastiCache is a managed service that reduces the administrative burden of deploying an in-memory cache in the cloud.

Please refer the following white paper for more information.

• https://d0.awsstatic.com/whitepapers/performance-at-scale-with-amazon-elasticache.pdf