A Solutions Architect is designing an application that will encrypt all data in an Amazon Redshift cluster. Which action will encrypt the data at rest?
A. Place the Redshift cluster in a private subnet.
B. Use the AWS KMS Default Customer master key.
C. Encrypt the Amazon EBS volumes.
D. Encrypt the data using SSL/TLS.
A website experiences unpredictable traffic. During peak traffic times, the database is unable to keep up with the write request. Which AWS service will help decouple the web application from the database?
A. Amazon SQS
B. Amazon EFS
C. Amazon S3
D. AWS Lambda
A legacy application needs to interact with local storage using iSCSI. A team needs to design a reliable storage solution to provision all new storage on AWS. Which storage solution meets the legacy application requirements?
A. AWS Snowball storage for the legacy application until the application can be re-architected.
B. AWS Storage Gateway in cached mode for the legacy application storage to write data to Amazon S3.
C. AWS Storage Gateway in stored mode for the legacy application storage to write data to Amazon S3.
D. An Amazon S3 volume mounted on the legacy application server locally using the File Gateway service.
- 分析：关键词是local stroage with iSCSI, 并且需要将所有新的存储用AWS提供，所以排除A选项；因为用到了iSCSI协议，所以S3使用文件网关方式也不适用，排除D；剩下的B和C区别在于存储模式，因为需要本地应用请求，所以需要使用存储模式，而不能用缓存模式，所以最终选择C。
A Solutions Architect is designing an architecture for a mobile gaming application. The application is expected to be very popular. The Architect needs to prevent the Amazon RDS MySQL database from becoming a bottleneck due to frequently accessed queries. Which service or feature should the Architect add to prevent a bottleneck?
A. Multi-AZ feature on the RDS MySQL Database
B. ELB Classic Load Balancer in front of the web application tier
C. Amazon SQS in front of RDS MySQL Database
D. Amazon ElastiCache in front of the RDS MySQL Database
- 分析：该问题的关键在于bottleneck due to frequently accessed queries，查询变成瓶颈，可以使用ElastiCache服务作为缓存，降低读取频率解决问题。