- (Topic 3)
Which AWS Cloud benefit describes the ability to acquire resources as they are needed and release resources when they are no longer needed?
Correct Answer:
B
The AWS Cloud benefit that describes the ability to acquire resources as they are needed and release resources when they are no longer needed is elasticity. Elasticity means that users can quickly add and remove resources to match the demand of their applications, and only pay for what they use. Elasticity enables users to handle unpredictable workloads, reduce costs, and improve performance1. Economies of scale, agility, and security are other benefits of the AWS Cloud, but they do not describe the specific ability of acquiring and releasing resources on demand.
- (Topic 1)
Which AWS service or tool does AWS Control Tower use to create resources?
Correct Answer:
A
AWS Control Tower uses AWS CloudFormation to create resources in your landing zone. AWS CloudFormation is a service that helps you model and set up your AWS resources using templates. AWS Control Tower supports creating AWS::ControlTower::EnabledControl resources in AWS CloudFormation. Therefore, the correct answer is A. You can learn more about AWS Control Tower and AWS CloudFormation from this page.
- (Topic 1)
Which AWS service is a highly available and scalable DNS web service?
Correct Answer:
C
Amazon Route 53 is a highly available and scalable DNS web service. It is designed to give developers and businesses an extremely reliable and cost-effective way to route end users to Internet applications by translating domain names into the numeric IP addresses that computers use to connect to each other2. Amazon Route 53 also offers other features such as health checks, traffic management, domain name registration, and DNSSEC3.
- (Topic 1)
A company has two AWS accounts in an organization in AWS Organizations for consolidated billing. All of the company's AWS resources are hosted in one AWS Region.
Account A has purchased five Amazon EC2 Standard Reserved Instances (RIs) and has four EC2 instances running. Account B has not purchased any RIs and also has four EC2 instances running. Which statement is true regarding pricing for these eight instances?
Correct Answer:
B
The statement that is true regarding pricing for these eight instances is: four instances will be charged as RIs, and four will be charged as regular instances. Amazon EC2 Reserved Instances (RIs) are a pricing model that allows users to reserve EC2 instances for a specific term and benefit from discounted hourly rates and capacity reservation. RIs are purchased for a specific AWS Region, and can be shared across multiple accounts in an organization in AWS Organizations for consolidated billing. However, RIs are applied on a first-come, first-served basis, and there is no guarantee that all instances in the organization will be charged at the RI rate. In this case, Account A has purchased five RIs and has four instances running, so all four instances will be charged at the RI rate. Account B has not purchased any RIs and also has four instances running, so all four instances will be charged at the regular rate. The remaining RI in Account A will not be applied to any instance in Account B, and will be wasted.
- (Topic 3)
A company has a physical tape library to store data backups. The tape library is running out of space. The company needs to extend the tape library's capacity to the AWS Cloud.
Which AWS service should the company use to meet this requirement?
Correct Answer:
D
AWS Storage Gateway is a hybrid cloud storage service that provides on- premises access to virtually unlimited cloud storage. You can use AWS Storage Gateway to simplify storage management and reduce costs for key hybrid cloud storage use cases. One of these use cases is tape-based backup, which allows you to store data backups on virtual tapes in the AWS Cloud. You can use the Tape Gateway feature of AWS Storage Gateway to extend your existing physical tape library to the AWS Cloud. Tape Gateway provides a virtual tape infrastructure that scales seamlessly with your backup needs and eliminates the operational burden of provisioning, scaling, and maintaining a physical tape infrastructure123. References: 1: Cloud Storage Appliances, Hybrid Device - AWS Storage Gateway - AWS, 2: AWS Storage Gateway Documentation, 3: AWS Storage Gateway Features | Amazon Web Services
