Practice Test

True or False: Rightsizing is the process of identifying underused resources and reducing them to increase efficiency.

  • True
  • False

Answer: True

Explanation: Rightsizing refers to a systematic approach in ensuring a company’s available resources are most efficiently utilized, this includes identifying and reducing underused resources.

Rightsizing in AWS only applies to EBS volumes. True/False?

  • True
  • False

Answer: False

Explanation: Rightsizing applies to various resources in AWS, including EC2 instances, EBS volumes, and RDS instances.

Which AWS tool can be used in rightsizing?

  • a) AWS Trusted Advisor
  • b) AWS Lambda
  • c) AWS EC2
  • d) Amazon S3

Answer: a) AWS Trusted Advisor

Explanation: AWS Trusted Advisor can provide recommendations for rightsizing, it helps you to observe and modify your resources to optimize performance and costs.

Rightsizing for cost optimization is a one-time activity. True/False?

  • True
  • False

Answer: False

Explanation: Optimization through rightsizing is not a one-off job. It’s an ongoing process that involves continuous monitoring and analysis to ensure efficient resource usage.

Rightsizing will normally result in higher costs for your AWS environment. True/False?

  • True
  • False

Answer: False

Explanation: The purpose of rightsizing is to optimize the usage of AWS resources, which normally results in a reduction of your overall costs.

The goal of right-sizing is to ________.

  • a) Increase the number of instances
  • b) Decrease the number of instances
  • c) Optimally match resource allocation with workload requirements
  • d) Remove all unused instances

Answer: c) Optimally match resource allocation with workload requirements

Explanation: The main objective of right-sizing is to ensure that the allocation of resources meets workload requirements, this can both increase efficiency and decrease costs.

Which of the following services is not targeted in a rightsizing effort?

  • a) Amazon EC2
  • b) Amazon S3
  • c) Amazon EBS
  • d) Amazon Simple Email Service (SES)

Answer: d) Amazon Simple Email Service (SES)

Explanation: Rightsizing typically involves computing, storage, and database services such as Amazon EC2, Amazon S3, and Amazon EBS, but does not typically target a service like Amazon Simple Email Service (SES).

Rightsizing can result in a degradation of application performance if not properly managed. True/False?

  • True
  • False

Answer: True

Explanation: If rightsizing is not done properly, it can lead to insufficient resources being available for your application, which in turn could degrade performance.

Rightsizing in AWS is a completely automated process. True/False?

  • True
  • False

Answer: False

Explanation: Although AWS provides tools to assist with rightsizing, the decision to change resources ultimately lies with the user and is not automatically implemented by AWS.

True or False: After rightsizing, it is not necessary to monitor AWS environment.

  • True
  • False

Answer: False

Explanation: Post-rightsizing, it’s essential to continue monitoring to verify the effect of changes and to detect any new opportunities for further optimization.

Interview Questions

What is the primary objective of rightsizing for an AWS cloud strategist?

Rightsizing aims to match the performance and capacity requirements of workloads with cost-effective AWS resources that offer the appropriate scale.

How does the process of rightsizing help AWS users in managing resource allocation?

The rightsizing process helps users optimize their AWS use by identifying, measuring, and adjusting the types of AWS resources that are required for specific workloads. Consequently, this process eliminates wastages and reduces operational costs.

When performing rightsizing on AWS, what tool can be used to get recommendations to optimize costs and performance?

AWS provides AWS Cost Explorer Rightsizing Recommendations tool which can give you insights about your current resource utilization and recommend more cost-effective resources.

What is the first step in rightsizing AWS resources?

The first step is to gather data on your current environment. It involves measuring current resource utilization over time and monitoring performance to understand how your infrastructure aligns with workload requirements.

How often should you perform rightsizing in the AWS Cloud?

Rightsizing should be done on an on-going basis because workloads can change over time.

Which AWS tool can you use to continuously monitor your resources so you can make decisions about rightsizing?

Amazon CloudWatch is a versatile tool that automatically collects operational data for monitoring resources, which aids in making decisions about rightsizing.

In terms of AWS pricing models, how does rightsizing help in cost optimization?

Rightsizing helps in cost optimization by enabling businesses to select the appropriate pricing model based on their workload and usage. This might include on-demand instances, reserved instances, or spot instances.

Can rightsizing recommendations include different AWS families, generations, and sizes?

Yes, AWS Cost Explorer rightsizing recommendations can include different instance families, generations, and sizes based on the usage and performance patterns.

If a company is over-provisioning EC2 instances and paying for unused capacity, how does rightsizing tackle this issue?

Rightsizing reviews the usage patterns, CPU utilization, and memory requirements of the EC2 instances and recommends switching to smaller and more cost-effective instances that adequately meet the workload requirements.

How does auto-scaling fit into AWS cloud rightsizing?

Auto-scaling dynamically adjusts the number of instances based on the demand. If properly configured, it can ensure you are operating at the most optimized level, thus complementing the rightsizing efforts.

How can Amazon Elastic Block Store (EBS) benefit from rightsizing?

Rightsizing Amazon EBS Volume can help in reducing costs by ensuring that you are not over-provisioning storage and it matches the size, throughput, and performance your applications require.

If I’ve already implemented a rightsizing plan, do I need to be concerned about it in the future?

Yes, rightsizing is an ongoing process. You should regularly review your workloads and usage patterns to ensure you’re using the most cost-effective AWS resources that meet your needs.

Does Rightsizing involve only horizontal scaling (increasing or decreasing the number of instances) in AWS?

No, rightsizing involves both horizontal scaling (modifying the number of instances) and vertical scaling (modifying the type or size of an instance).

Is Rightsizing necessary if I am using serverless services like AWS Lambda?

Even while using serverless services, rightsizing is important to ensure that the allocated resources meet the specific demands of each workload, in order to prevent unnecessary costs and performance issues.

What happens if I ignore AWS rightsizing recommendations for my EC2 instances?

Ignoring rightsizing recommendations could lead to paying for unused capacity. This means you might end up with excessive costs and under-utilized resources. It could also lead to instances being over-utilized, affecting the performance.

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