AWS Solutions Architect Cost Optimization & Performance

Question 1

Which AWS pricing model offers the highest discount for long-term commitment?

Accepted Answer

Reserved Instances

Answer

Reserved Instances (RIs) offer a significant discount compared to On-Demand pricing in exchange for a commitment to a specific instance type and region for a 1-year or 3-year term. This pricing model is ideal for applications with predictable, steady-state workloads, providing substantial cost savings over the long term. The longer the commitment, the greater the discount.

Question 2

Which AWS tool helps analyze and reduce cloud costs?

Accepted Answer

AWS Cost Explorer

Answer

AWS Cost Explorer is a tool that allows you to visualize, understand, and manage your AWS costs and usage over time. It provides customizable reports and forecasts to help you analyze your spending patterns, identify cost-saving opportunities, and plan future budgets. By offering detailed insights, Cost Explorer empowers you to optimize your cloud expenditure.

Question 3

Which AWS service allows automatic scaling of resources based on real-time demand?

Accepted Answer

AWS Auto Scaling

Answer

AWS Auto Scaling automatically adjusts the number of compute resources, such as EC2 instances, in your application based on real-time demand. It ensures that your application maintains optimal performance and availability during peak loads while also reducing costs by scaling down during periods of low demand. This dynamic adjustment is crucial for efficient resource utilization.

Question 4

Which AWS storage class offers the lowest cost for infrequent access?

Accepted Answer

Amazon S3 Glacier

Answer

Amazon S3 Glacier is a secure, durable, and extremely low-cost storage class designed for data archiving and long-term backup. It is optimized for data that is infrequently accessed, with retrieval times ranging from minutes to hours. Glacier offers significant cost savings for data you rarely need but must retain for compliance or historical purposes.

Question 5

What AWS service helps optimize compute costs by allowing workloads to run on unused EC2 capacity?

Accepted Answer

AWS Spot Instances

Answer

AWS Spot Instances allow you to bid on unused EC2 capacity, offering significant discounts compared to On-Demand prices. They are ideal for fault-tolerant, flexible, and stateless workloads that can tolerate interruptions, such as batch processing, data analysis, or development environments. Utilizing Spot Instances can lead to substantial cost savings for appropriate workloads.

AWS Practice Test

AWS Practice Test

AWS Solutions Architect Cost Optimization & Performance