Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is migrating its on-premises infrastructure to AWS. The operations team needs a managed service that allows them to define their entire cloud environment—including VPCs, subnets, EC2 instances, and RDS databases—as a reusable template stored in version control. The service must automatically handle resource dependencies, such as creating the database before launching the application servers, and ensure that the infrastructure is provisioned consistently across multiple environments (e.g., development, staging, production). Which AWS service should the company use to meet these requirements?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
AWS CloudFormation
AWS CloudFormation allows you to define your entire infrastructure as code in a template. It automatically manages resource dependencies, handles creation and updates in the correct order, and provides consistent provisioning across environments. This matches the requirement for a managed infrastructure-as-code service.
B
Distractor review
AWS Elastic Beanstalk
AWS Elastic Beanstalk is a PaaS service that simplifies deploying and scaling applications. It automatically provisions underlying resources (e.g., EC2, load balancers) based on the application needs, but it does not give you direct control to define arbitrary resources like custom VPCs or RDS with specific configurations. The requirement is for a service that defines the entire infrastructure as code, not just an application platform.
C
Distractor review
AWS OpsWorks
AWS OpsWorks is a configuration management service that uses Chef and Puppet to automate server configuration and application deployment. While it can manage EC2 instances, it is not designed for provisioning core network resources (VPC, subnets) or managed databases. The team needs an infrastructure-as-code service, not a configuration management tool.
D
Distractor review
AWS CodeDeploy
AWS CodeDeploy automates the deployment of application code to running instances (EC2, Lambda, etc.). It does not provision infrastructure resources such as VPCs, subnets, or databases. The requirement is about defining and creating the infrastructure itself, not deploying code onto existing infrastructure.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
A solutions architect is planning a new web application on AWS. The workload will include 3 Amazon EC2 instances (t3.medium) running 24/7, an Application Load Balancer, and an Amazon RDS for MySQL db.t3.small database. The architect needs to estimate the monthly cost for the first year, considering different purchasing options (On-Demand, 1-year All Upfront Reserved Instance, and Compute Savings Plan). Which AWS tool should the architect use to create this estimate?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: AWS CloudFormation — AWS CloudFormation is the correct service for defining infrastructure as code. Using CloudFormation templates (JSON or YAML), you can declaratively specify all AWS resources and their dependencies, and CloudFormation provisions them in the correct order automatically. This enables repeatable and predictable deployments across environments. AWS Elastic Beanstalk is a Platform-as-a-Service (PaaS) that automates application deployment but does not give you fine-grained control to define arbitrary infrastructure resources like VPCs and subnets; it abstracts the underlying infrastructure. AWS OpsWorks is a configuration management service based on Chef and Puppet, focused on automating server configuration, not on provisioning core network and database resources. AWS CodeDeploy automates application code deployments to existing compute instances, not infrastructure provisioning.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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