AWS Cloud Practitioner Cloud
Economics & Cost Optimization Practice
Test 2026–2027 | Cost Management
Questions, Answers & Detailed
Rationales
1. A company is migrating an unpredictable workload to AWS. The workload
runs continuously but its resource requirements fluctuate significantly
throughout the year. Which purchasing strategy best supports cost optimization
while maintaining flexibility?
A. Purchase Dedicated Hosts for all workloads
B. Use only On-Demand Instances indefinitely
C. Use a combination of On-Demand capacity and Savings Plans based on stable
usage
D. Purchase Reserved Instances for the maximum possible capacity
Answer: C. Use a combination of On-Demand capacity and Savings Plans based
on stable usage
,Rationale: Savings Plans can reduce costs for predictable baseline usage while
On-Demand capacity preserves flexibility for variable demand. This mixed
approach avoids paying long-term commitments for resources that may not be
consistently required.
2. Which AWS principle most directly explains why cloud computing can reduce
capital expenditure (CapEx)?
A. Customers must purchase physical servers before deployment
B. Customers replace large upfront infrastructure purchases with usage-based
spending
C. Customers must maintain AWS data centers
D. Customers pay a fixed infrastructure fee regardless of usage
Answer: B. Customers replace large upfront infrastructure purchases with
usage-based spending
Rationale: AWS changes the traditional infrastructure model by allowing
organizations to consume resources without purchasing and maintaining
physical infrastructure. Costs can therefore shift from upfront CapEx toward
variable operating expenditure (OpEx).
3. A workload runs for 24 hours every day and is expected to remain stable for
several years. Which option is generally most appropriate for reducing compute
costs?
A. On-Demand Instances only
B. Spot Instances only
C. A suitable Savings Plan or Reserved Instance commitment
D. Dedicated Hosts with no commitment
Answer: C. A suitable Savings Plan or Reserved Instance commitment
,Rationale: Stable, long-running workloads are strong candidates for discounted
commitment-based pricing. Savings Plans and Reserved Instances can provide
significant savings compared with continuously using On-Demand pricing.
4. A company wants to determine which AWS resources are responsible for
unexpected increases in its monthly bill. Which service should it primarily use
for detailed cost analysis?
A. AWS CloudTrail
B. AWS Cost Explorer
C. Amazon Inspector
D. AWS Config
Answer: B. AWS Cost Explorer
Rationale: AWS Cost Explorer provides interactive analysis of AWS costs and
usage, allowing organizations to identify trends, services, accounts, Regions,
and other dimensions contributing to spending.
5. Which AWS service allows an organization to establish budgets and receive
notifications when actual or forecasted costs exceed defined thresholds?
A. AWS Budgets
B. AWS Trusted Advisor
C. AWS Pricing Calculator
D. AWS Billing Conductor
Answer: A. AWS Budgets
Rationale: AWS Budgets allows customers to create cost and usage budgets and
configure alerts based on actual or forecasted spending.
, 6. A development environment is used only from 8:00 AM to 6:00 PM on
weekdays. Which cost optimization approach is most appropriate?
A. Keep all resources running continuously
B. Schedule resources to stop outside working hours
C. Purchase additional capacity
D. Move the workload to a Dedicated Host
Answer: B. Schedule resources to stop outside working hours
Rationale: Stopping nonproduction resources when they are not needed reduces
unnecessary compute consumption. Scheduling is particularly effective for
predictable development and testing workloads.
7. Which statement best describes economies of scale in AWS?
A. Customers receive identical pricing regardless of usage
B. AWS can achieve lower infrastructure costs through large-scale purchasing and
operations
C. Customers must negotiate individually with hardware manufacturers
D. AWS requires customers to own physical infrastructure
Answer: B. AWS can achieve lower infrastructure costs through large-scale
purchasing and operations
Rationale: AWS operates infrastructure at massive scale, allowing it to benefit
from purchasing power, operational efficiencies, and utilization improvements
that can contribute to lower prices for customers.
8. A company wants to estimate the expected AWS cost of a new application
before deploying it. Which tool is most appropriate?
A. AWS Cost Explorer
B. AWS Pricing Calculator
Economics & Cost Optimization Practice
Test 2026–2027 | Cost Management
Questions, Answers & Detailed
Rationales
1. A company is migrating an unpredictable workload to AWS. The workload
runs continuously but its resource requirements fluctuate significantly
throughout the year. Which purchasing strategy best supports cost optimization
while maintaining flexibility?
A. Purchase Dedicated Hosts for all workloads
B. Use only On-Demand Instances indefinitely
C. Use a combination of On-Demand capacity and Savings Plans based on stable
usage
D. Purchase Reserved Instances for the maximum possible capacity
Answer: C. Use a combination of On-Demand capacity and Savings Plans based
on stable usage
,Rationale: Savings Plans can reduce costs for predictable baseline usage while
On-Demand capacity preserves flexibility for variable demand. This mixed
approach avoids paying long-term commitments for resources that may not be
consistently required.
2. Which AWS principle most directly explains why cloud computing can reduce
capital expenditure (CapEx)?
A. Customers must purchase physical servers before deployment
B. Customers replace large upfront infrastructure purchases with usage-based
spending
C. Customers must maintain AWS data centers
D. Customers pay a fixed infrastructure fee regardless of usage
Answer: B. Customers replace large upfront infrastructure purchases with
usage-based spending
Rationale: AWS changes the traditional infrastructure model by allowing
organizations to consume resources without purchasing and maintaining
physical infrastructure. Costs can therefore shift from upfront CapEx toward
variable operating expenditure (OpEx).
3. A workload runs for 24 hours every day and is expected to remain stable for
several years. Which option is generally most appropriate for reducing compute
costs?
A. On-Demand Instances only
B. Spot Instances only
C. A suitable Savings Plan or Reserved Instance commitment
D. Dedicated Hosts with no commitment
Answer: C. A suitable Savings Plan or Reserved Instance commitment
,Rationale: Stable, long-running workloads are strong candidates for discounted
commitment-based pricing. Savings Plans and Reserved Instances can provide
significant savings compared with continuously using On-Demand pricing.
4. A company wants to determine which AWS resources are responsible for
unexpected increases in its monthly bill. Which service should it primarily use
for detailed cost analysis?
A. AWS CloudTrail
B. AWS Cost Explorer
C. Amazon Inspector
D. AWS Config
Answer: B. AWS Cost Explorer
Rationale: AWS Cost Explorer provides interactive analysis of AWS costs and
usage, allowing organizations to identify trends, services, accounts, Regions,
and other dimensions contributing to spending.
5. Which AWS service allows an organization to establish budgets and receive
notifications when actual or forecasted costs exceed defined thresholds?
A. AWS Budgets
B. AWS Trusted Advisor
C. AWS Pricing Calculator
D. AWS Billing Conductor
Answer: A. AWS Budgets
Rationale: AWS Budgets allows customers to create cost and usage budgets and
configure alerts based on actual or forecasted spending.
, 6. A development environment is used only from 8:00 AM to 6:00 PM on
weekdays. Which cost optimization approach is most appropriate?
A. Keep all resources running continuously
B. Schedule resources to stop outside working hours
C. Purchase additional capacity
D. Move the workload to a Dedicated Host
Answer: B. Schedule resources to stop outside working hours
Rationale: Stopping nonproduction resources when they are not needed reduces
unnecessary compute consumption. Scheduling is particularly effective for
predictable development and testing workloads.
7. Which statement best describes economies of scale in AWS?
A. Customers receive identical pricing regardless of usage
B. AWS can achieve lower infrastructure costs through large-scale purchasing and
operations
C. Customers must negotiate individually with hardware manufacturers
D. AWS requires customers to own physical infrastructure
Answer: B. AWS can achieve lower infrastructure costs through large-scale
purchasing and operations
Rationale: AWS operates infrastructure at massive scale, allowing it to benefit
from purchasing power, operational efficiencies, and utilization improvements
that can contribute to lower prices for customers.
8. A company wants to estimate the expected AWS cost of a new application
before deploying it. Which tool is most appropriate?
A. AWS Cost Explorer
B. AWS Pricing Calculator
