Cost Optimization and Pricing | AWS Certified Solutions Architect – Associate MCQs
In preparation for the AWS Certified Solutions Architect – Associate exam, understanding AWS Pricing Models, Cost Explorer, Auto Scaling, Resource Tagging, and Trusted Advisor is crucial. These scenario-based questions focus on key topics like cost optimization and pricing strategies. Test your knowledge and get ready for the exam with these comprehensive questions.
AWS Pricing Models: On-demand, Reserved Instances, Savings Plans, and Spot Instances
1. A company is planning to run EC2 instances for a predictable workload with high uptime requirements for the next three years. Which of the following pricing models should the company choose to maximize cost savings? (Select all that apply)
a) On-demand instances
b) Reserved Instances
c) Spot Instances
d) Savings Plans
e) Dedicated Hosts
2. A company needs to run an EC2 instance for a few hours each month during peak times, but the workload is unpredictable. Which AWS pricing model will provide the best cost efficiency for this scenario?
a) On-demand instances
b) Reserved Instances
c) Spot Instances
d) Savings Plans
e) Scheduled Reserved Instances
3. A business is looking to save costs for long-term EC2 workloads but is unsure of the exact usage patterns. Which pricing model should they consider to allow flexibility? (Select all that apply)
a) On-demand instances
b) Savings Plans
c) Reserved Instances
d) Spot Instances
e) Elastic Load Balancing
AWS Budgets and Cost Explorer: Cost Tracking and Forecasting
4. You want to set up a monthly budget to track and receive alerts when AWS spending exceeds a specific threshold. Which service should you use?
a) Cost Explorer
b) AWS Budgets
c) Trusted Advisor
d) AWS Cost and Usage Report
e) AWS CloudWatch
5. A company has a significant spike in AWS costs, and they want to analyze and understand the specific services responsible for the increased cost. Which AWS service provides a detailed breakdown of usage and costs by service?
a) AWS Budgets
b) Cost Explorer
c) Trusted Advisor
d) Cost Allocation Tags
e) AWS Cost and Usage Report
6. You want to forecast future AWS costs based on historical data and usage patterns. Which AWS tool should you use to make cost predictions?
a) AWS Budgets
b) AWS Trusted Advisor
c) Cost Explorer
d) AWS Cost and Usage Report
e) AWS Cost Anomaly Detection
Right-Sizing and Auto Scaling
7. A company’s EC2 instances are frequently underutilized. Which of the following actions would be most effective for reducing costs while maintaining performance? (Select all that apply)
a) Increase the instance size to handle peak demand
b) Use Reserved Instances for long-term savings
c) Use Auto Scaling to match demand
d) Switch to Spot Instances
e) Migrate to a different AWS region
8. A business is experiencing fluctuating web traffic and needs to ensure their web application scales automatically to handle the varying load. Which solution will automatically adjust the number of EC2 instances based on traffic demand?
a) Elastic Load Balancer
b) Auto Scaling Group
c) EC2 Auto Recovery
d) AWS Elastic Beanstalk
e) EC2 Reserved Instances
9. You are tasked with optimizing the cost of an EC2 workload that fluctuates depending on demand. The workload is not critical and can tolerate interruptions. Which pricing option is most cost-effective?
a) On-demand instances
b) Reserved Instances
c) Savings Plans
d) Spot Instances
e) Dedicated Hosts
Resource Tagging: Cost Allocation Tags
10. A company wants to track the cost of its AWS resources by department. What should the company use to categorize and allocate costs?
a) AWS Budgets
b) Resource Tags
c) EC2 Reserved Instances
d) Cost Explorer
e) AWS CloudFormation
11. You are implementing cost allocation for different projects using AWS resources. What must you ensure when setting up tags for cost allocation?
a) The tags must be unique across AWS accounts
b) Tags must be applied at the resource level
c) Only S3 resources can be tagged for cost allocation
d) The tags must be assigned manually via the CLI
e) Only instances can have cost allocation tags
12. A company wants to track and allocate costs of multiple EC2 instances across different departments. What is the most effective way to achieve this?
a) Use AWS Budgets to set cost targets for each department
b) Apply cost allocation tags to each EC2 instance and then use Cost Explorer
c) Use Trusted Advisor to check cost optimization suggestions
d) Set up a different AWS account for each department
e) Enable CloudTrail for cost tracking
Trusted Advisor: Cost Optimization Recommendations
13. A company is using AWS but wants to optimize its current AWS infrastructure to reduce unnecessary costs. Which AWS service will provide recommendations for cost optimization?
a) Cost Explorer
b) AWS Budgets
c) AWS Trusted Advisor
d) AWS Cost Anomaly Detection
e) AWS Cost and Usage Report
14. Which Trusted Advisor check would help a company identify underutilized EC2 instances to reduce costs?
a) Security Group Best Practices
b) S3 Bucket Permissions
c) Low Utilization Amazon EC2 Instances
d) Amazon RDS Instance Best Practices
e) Cost Optimization Alerts
15. You notice that your organization has multiple unused EBS volumes, leading to unnecessary costs. Which tool can help identify such resources and suggest cost-saving measures?
a) Cost Explorer
b) AWS Trusted Advisor
c) AWS Budgets
d) CloudTrail
e) EC2 Auto Scaling
Mixed Scenario Questions
16. A company is running multiple EC2 instances with varying workloads and unpredictable traffic. Which solution should they implement to optimize costs? (Select all that apply)
a) Use Reserved Instances for all instances
b) Implement Auto Scaling with Spot Instances
c) Use Savings Plans for long-running instances only
d) Use On-demand instances with a Load Balancer
e) Purchase additional Dedicated Hosts for all workloads
17. A business has a large number of AWS resources across different regions and wants to set up detailed cost tracking. What should they implement?
a) Cost Explorer
b) AWS Budgets
c) Cost Allocation Tags
d) AWS Trusted Advisor
e) CloudFormation
18. You are planning a new AWS infrastructure for a startup. The startup has minimal upfront capital but expects steady usage over time. Which pricing model is the most cost-effective for them?
a) On-demand instances
b) Spot Instances
c) Savings Plans
d) Reserved Instances
e) EC2 Auto Scaling
19. A company is using AWS services for a short-term project and wants to minimize its costs. Which pricing model should they use for flexibility and cost savings?
a) Reserved Instances
b) Savings Plans
c) Spot Instances
d) On-demand instances
e) Dedicated Hosts
20. You have configured an Auto Scaling group that adds EC2 instances when the CPU usage exceeds 70%. Which of the following would help optimize costs in this situation? (Select all that apply)
a) Use Reserved Instances
b) Implement EC2 Spot Instances in the Auto Scaling group
c) Enable CloudWatch Alarms to reduce scaling events
d) Use Auto Scaling with larger EC2 instances
e) Implement a Savings Plan for long-term EC2 usage
Answer Key
| Qno | Answer (Option with text) |
|---|---|
| 1 | b) Reserved Instances, d) Savings Plans |
| 2 | a) On-demand instances |
| 3 | b) Savings Plans, c) Reserved Instances |
| 4 | b) AWS Budgets |
| 5 | b) Cost Explorer |
| 6 | c) Cost Explorer |
| 7 | c) Use Auto Scaling to match demand, d) Switch to Spot Instances |
| 8 | b) Auto Scaling Group |
| 9 | d) Spot Instances |
| 10 | b) Resource Tags |
| 11 | b) Tags must be applied at the resource level |
| 12 | b) Apply cost allocation tags to each EC2 instance and then use Cost Explorer |
| 13 | c) AWS Trusted Advisor |
| 14 | c) Low Utilization Amazon EC2 Instances |
| 15 | b) AWS Trusted Advisor |
| 16 | b) Implement Auto Scaling with Spot Instances, d) Use On-demand instances with a Load Balancer |
| 17 | c) Cost Allocation Tags |
| 18 | c) Savings Plans |
| 19 | c) Spot Instances |
| 20 | b) Implement EC2 Spot Instances in the Auto Scaling group, c) Enable CloudWatch Alarms to reduce scaling events |