Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is deploying a multi-tier web application that includes a VPC, subnets, security groups, EC2 instances, and an Application Load Balancer. The team needs to define the entire infrastructure in a version-controlled template so that it can be consistently deployed across development, test, and production environments with minimal manual effort. Which AWS service should the team use to meet this requirement?
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
Correct. AWS CloudFormation is a service that allows you to model and provision AWS resources using templates. This enables Infrastructure as Code (IaC), ensuring consistent and repeatable deployments across environments.
B
Distractor review
AWS Elastic Beanstalk
Incorrect. AWS Elastic Beanstalk is a PaaS service that automatically handles deployment, capacity provisioning, and load balancing for applications. While it simplifies deployment, it does not provide the granular, version-controlled infrastructure template the team needs for multi-tier networking and security groups.
C
Distractor review
AWS OpsWorks
Incorrect. AWS OpsWorks is a configuration management service that uses Chef or Puppet to manage server configurations and automate operational tasks. It is not designed for defining and provisioning core AWS infrastructure resources like VPCs and subnets via templates.
D
Distractor review
AWS Systems Manager
Incorrect. AWS Systems Manager provides a unified interface for operational tasks such as patch management, automation, and inventory collection. It does not offer a template-based approach for provisioning infrastructure resources.
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 — This scenario describes Infrastructure as Code (IaC), where infrastructure is provisioned and managed using templates. AWS CloudFormation is the service that allows you to define your AWS resources in a declarative template (JSON or YAML) and then deploy them as a single stack. This ensures consistency, repeatability, and version control across environments. The other options address different needs: Elastic Beanstalk is a Platform as a Service (PaaS) that automates application deployment but abstracts the underlying infrastructure, making it less suitable for granular control of networking and security groups. OpsWorks uses Chef or Puppet for configuration management, not for defining AWS resources. Systems Manager provides operational tools for patching, automation, and inventory but is not designed for provisioning core infrastructure from templates.
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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