AWS CLF-C02 Final Exam Questions
2026–2027 | Cloud Practitioner
Comprehensive Assessment with
Answers & Explanations
1. A company wants to migrate a three-tier web application to AWS. The
application requires highly available compute capacity, a relational
database, and object storage for user-generated files. Which combination
of AWS services is most appropriate?
A. Amazon EC2, Amazon RDS, and Amazon S3
B. Amazon S3, Amazon DynamoDB, and AWS Lambda
C. Amazon EBS, Amazon Redshift, and Amazon SQS
D. Amazon CloudFront, Amazon Athena, and Amazon EFS
Answer: A. Amazon EC2, Amazon RDS, and Amazon S3
Rationale: Amazon EC2 provides configurable compute, Amazon RDS provides
managed relational databases, and Amazon S3 provides highly durable object
storage. This combination closely matches the requirements of a traditional
three-tier application.
, 2. A startup wants to run application code without provisioning or managing
servers. The workload is event-driven and runs only when requests occur.
Which AWS service is the best fit?
A. Amazon EC2
B. AWS Lambda
C. Amazon Lightsail
D. Amazon ECS on EC2
Answer: B. AWS Lambda
Rationale: AWS Lambda is a serverless compute service that executes code in
response to events without requiring customers to manage servers.
3. A company wants its application to remain available if an entire Availability
Zone becomes unavailable. Which architecture best supports this
objective?
A. Deploy all resources in one Availability Zone
B. Deploy resources across multiple Availability Zones
C. Use multiple EC2 instances in one subnet
D. Store application data only on instance storage
Answer: B. Deploy resources across multiple Availability Zones
Rationale: Availability Zones are separate infrastructure locations within an
AWS Region. Deploying across multiple Availability Zones reduces the impact of
an individual Availability Zone failure.
4. A business needs to estimate the monthly AWS cost of a planned
architecture before deployment. Which service should it use?
A. AWS Cost Explorer
B. AWS Pricing Calculator
C. AWS Budgets
D. AWS CloudTrail
Answer: B. AWS Pricing Calculator
,Rationale: AWS Pricing Calculator allows organizations to estimate expected
AWS service costs before implementing workloads.
5. A company needs to receive an alert when its monthly AWS spending
exceeds a predefined threshold. Which service is designed for this purpose?
A. AWS Budgets
B. Amazon CloudWatch Logs
C. AWS Config
D. AWS Trusted Advisor
Answer: A. AWS Budgets
Rationale: AWS Budgets allows customers to create cost and usage thresholds
and receive notifications when actual or forecasted spending reaches those
thresholds.
6. An organization wants to analyze historical AWS spending and identify
which services are responsible for cost increases. Which service is most
appropriate?
A. AWS Cost Explorer
B. AWS Pricing Calculator
C. AWS Artifact
D. Amazon Inspector
Answer: A. AWS Cost Explorer
Rationale: AWS Cost Explorer provides tools for analyzing historical AWS costs
and usage, including service-level and time-based breakdowns.
7. A company wants to protect frequently accessed application data from
hardware failure while improving application performance. Which storage
type is directly attached to an EC2 instance and is designed for block
storage?
A. Amazon S3
B. Amazon EBS
, C. Amazon SQS
D. Amazon Glacier
Answer: B. Amazon EBS
Rationale: Amazon Elastic Block Store provides persistent block-level storage
volumes designed for use with Amazon EC2.
8. An organization needs a highly durable storage service for backups, media,
and documents. Which service should it select?
A. Amazon S3
B. Amazon EC2 Instance Store
C. Amazon RDS
D. Amazon ElastiCache
Answer: A. Amazon S3
Rationale: Amazon S3 is an object storage service designed for highly durable
storage of data such as backups, documents, images, and media.
9. A company needs a managed relational database service that supports
automated backups and patching. Which service is most appropriate?
A. Amazon DynamoDB
B. Amazon RDS
C. Amazon S3
D. Amazon Neptune only
Answer: B. Amazon RDS
Rationale: Amazon RDS is a managed relational database service that simplifies
database administration tasks such as backups, patching, and maintenance.
10.An application requires a NoSQL database capable of providing low-latency
performance at scale. Which AWS service is the best choice?
2026–2027 | Cloud Practitioner
Comprehensive Assessment with
Answers & Explanations
1. A company wants to migrate a three-tier web application to AWS. The
application requires highly available compute capacity, a relational
database, and object storage for user-generated files. Which combination
of AWS services is most appropriate?
A. Amazon EC2, Amazon RDS, and Amazon S3
B. Amazon S3, Amazon DynamoDB, and AWS Lambda
C. Amazon EBS, Amazon Redshift, and Amazon SQS
D. Amazon CloudFront, Amazon Athena, and Amazon EFS
Answer: A. Amazon EC2, Amazon RDS, and Amazon S3
Rationale: Amazon EC2 provides configurable compute, Amazon RDS provides
managed relational databases, and Amazon S3 provides highly durable object
storage. This combination closely matches the requirements of a traditional
three-tier application.
, 2. A startup wants to run application code without provisioning or managing
servers. The workload is event-driven and runs only when requests occur.
Which AWS service is the best fit?
A. Amazon EC2
B. AWS Lambda
C. Amazon Lightsail
D. Amazon ECS on EC2
Answer: B. AWS Lambda
Rationale: AWS Lambda is a serverless compute service that executes code in
response to events without requiring customers to manage servers.
3. A company wants its application to remain available if an entire Availability
Zone becomes unavailable. Which architecture best supports this
objective?
A. Deploy all resources in one Availability Zone
B. Deploy resources across multiple Availability Zones
C. Use multiple EC2 instances in one subnet
D. Store application data only on instance storage
Answer: B. Deploy resources across multiple Availability Zones
Rationale: Availability Zones are separate infrastructure locations within an
AWS Region. Deploying across multiple Availability Zones reduces the impact of
an individual Availability Zone failure.
4. A business needs to estimate the monthly AWS cost of a planned
architecture before deployment. Which service should it use?
A. AWS Cost Explorer
B. AWS Pricing Calculator
C. AWS Budgets
D. AWS CloudTrail
Answer: B. AWS Pricing Calculator
,Rationale: AWS Pricing Calculator allows organizations to estimate expected
AWS service costs before implementing workloads.
5. A company needs to receive an alert when its monthly AWS spending
exceeds a predefined threshold. Which service is designed for this purpose?
A. AWS Budgets
B. Amazon CloudWatch Logs
C. AWS Config
D. AWS Trusted Advisor
Answer: A. AWS Budgets
Rationale: AWS Budgets allows customers to create cost and usage thresholds
and receive notifications when actual or forecasted spending reaches those
thresholds.
6. An organization wants to analyze historical AWS spending and identify
which services are responsible for cost increases. Which service is most
appropriate?
A. AWS Cost Explorer
B. AWS Pricing Calculator
C. AWS Artifact
D. Amazon Inspector
Answer: A. AWS Cost Explorer
Rationale: AWS Cost Explorer provides tools for analyzing historical AWS costs
and usage, including service-level and time-based breakdowns.
7. A company wants to protect frequently accessed application data from
hardware failure while improving application performance. Which storage
type is directly attached to an EC2 instance and is designed for block
storage?
A. Amazon S3
B. Amazon EBS
, C. Amazon SQS
D. Amazon Glacier
Answer: B. Amazon EBS
Rationale: Amazon Elastic Block Store provides persistent block-level storage
volumes designed for use with Amazon EC2.
8. An organization needs a highly durable storage service for backups, media,
and documents. Which service should it select?
A. Amazon S3
B. Amazon EC2 Instance Store
C. Amazon RDS
D. Amazon ElastiCache
Answer: A. Amazon S3
Rationale: Amazon S3 is an object storage service designed for highly durable
storage of data such as backups, documents, images, and media.
9. A company needs a managed relational database service that supports
automated backups and patching. Which service is most appropriate?
A. Amazon DynamoDB
B. Amazon RDS
C. Amazon S3
D. Amazon Neptune only
Answer: B. Amazon RDS
Rationale: Amazon RDS is a managed relational database service that simplifies
database administration tasks such as backups, patching, and maintenance.
10.An application requires a NoSQL database capable of providing low-latency
performance at scale. Which AWS service is the best choice?
