1. Right Answer: C
Explanation: Amazon ElastiCache for Redis is a great choice for implementing a highly available, distributed, and secure inmemory 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 sub-millisecond 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. https://aws.amazon.com/products/databases/real-time-apps-elasticache-for-redis/
2. Right Answer: D
Explanation: Of course, Amazon is responsible for auditing physical data center assets and resources since it is the property of Amazon Inc. Customers have no access to physical sites, hence they are not responsible for maintaining physical data center assets.
3. Right Answer: B,E
Explanation:
4. Right Answer: C,D
Explanation: Amazon Virtual Private Cloud (Amazon VPC) lets you provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you define. You have complete control over your virtual networking environment, including selection of your own IP address range, creation of subnets, and configuration of route tables and network gateways. You can use both IPv4 and IPv6 in your VPC for secure and easy access to resources and applications. You can easily customize the network configuration for your Amazon VPC. For example, you can create a public-facing subnet for your web servers that has access to the Internet, and place your backend systems such as databases or application servers in a private-facing subnet with no Internet access. You can leverage multiple layers of security, including security groups and network access control lists, to help control access to Amazon EC2 instances in each subnet. https://aws.amazon.com/vpc/
5. Right Answer: C
Explanation: https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/consolidated-billing.html
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