- (Exam Topic 3)
A company has migrated its workload to AWS. The company wants to forecast the workload's costs for each quarter for the next year. Which AWS service or tool provides this functionality?

1. A. AWS Organizations
2. B. AWS Budgets
3. C. AWS Cost Explorer
4. D. AWS Cost and Usage Report

Correct Answer: C

- (Exam Topic 3)
A company wants to reconfigure its ecommerce application to automatically scale to meet customer demands. The company wants the operating system that the application runs on to be automatically updated.
Which AWS service will meet these requirements?

1. A. Amazon Lightsail
2. B. Amazon EC2
3. C. AWS Lambda
4. D. Amazon EC2 Auto Scaling

Correct Answer: C

- (Exam Topic 3)
A company does not want to rely on elaborate forecasting to determine its usage of compute resources. Instead, the company wants to pay only for the resources that it uses. The company also needs the ability to increase or decrease its resource usage to meet business requirements.
Which pillar of the AWS Well-Architected Framework aligns with these requirements?

1. A. Operational excellence
2. B. Security
3. C. Reliability
4. D. Cost optimization

Correct Answer: D
Reliability Scale horizontally to increase aggregate workload availability: Replace one large resource with multiple small resources to reduce the impact of a single failure on the overall workload. Distribute requests across multiple, smaller resources to ensure that they don’t share a common point of failure. Stop guessing capacity: A common cause of failure in on-premises workloads is resource saturation, when the demands placed on a workload exceed the capacity of that workload (this is often the objective of denial of service attacks).

- (Exam Topic 2)
A company implements an Amazon EC2 Auto Scaling policy along with an Application Load Balancer to automatically recover unhealthy applications that run on Amazon EC2 instances.
Which pillar of the AWS Well-Architected Framework does this action cover?

1. A. Security
2. B. Performance efficiency
3. C. Operational excellence
4. D. Reliability

Correct Answer: D
The reliability pillar includes the ability of a system to recover from infrastructure or service disruptions

- (Exam Topic 2)
A company wants to deploy, scale, and manage third-party virtual appliances in a cluster in the AWS Cloud. These applications include firewalls, intrusion detection and prevention systems, and deep packet inspection systems.
Which AWS service or resource will meet these requirements?

1. A. Application Load Balancer
2. B. Gateway Load Balancer
3. C. Network Load Balancer
4. D. AWS Global Accelerator

Correct Answer: B
https://docs.aws.amazon.com/prescriptive-guidance/latest/integrate-third-party-services/resources.html