Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company runs a web application on Amazon EC2 instances behind an Application Load Balancer. The application experiences unpredictable traffic patterns, with sudden spikes during promotional events and low traffic at other times. The company configures an Auto Scaling group to automatically add EC2 instances when CPU utilization exceeds 70% and remove instances when utilization drops below 30%. The system handles the spike without any manual intervention and reduces capacity when demand decreases. Which fundamental characteristic of cloud computing does this scenario best illustrate?
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
Distractor review
On-demand self-service
While Auto Scaling is automated, on-demand self-service primarily means a user can provision resources without requiring human interaction. The scenario emphasizes automatic scaling up and down, not just initial provisioning.
B
Distractor review
Broad network access
Broad network access refers to resources being accessible over the network from various client platforms. This scenario does not focus on network accessibility; it focuses on adjusting capacity dynamically.
C
Distractor review
Resource pooling
Resource pooling means the provider's computing resources are pooled to serve multiple customers using a multi-tenant model. The scenario does not highlight multi-tenancy or shared infrastructure.
D
Best answer
Rapid elasticity
Rapid elasticity is the ability to quickly and automatically scale computing resources up or down to match demand. The Auto Scaling configuration that adds and removes EC2 instances based on CPU utilization directly demonstrates this cloud characteristic.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Related practice questions
Related CLF-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
AWS shared responsibility model practice questions
Practise CLF-C02 questions linked to AWS shared responsibility model.
AWS Cloud Practitioner cloud concepts practice questions
Practise CLF-C02 questions linked to AWS Cloud Practitioner cloud concepts.
AWS IAM practice questions
Practise CLF-C02 questions linked to AWS IAM.
AWS pricing practice questions
Practise CLF-C02 questions linked to AWS pricing.
AWS support plans practice questions
Practise CLF-C02 questions linked to AWS support plans.
AWS S3 practice questions
Practise CLF-C02 questions linked to AWS S3.
AWS EC2 practice questions
Practise CLF-C02 questions linked to AWS EC2.
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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Rapid elasticity — This scenario best illustrates rapid elasticity, which is the ability to provision and de-provision cloud resources automatically and quickly to scale with demand. Auto Scaling groups adjust the number of EC2 instances in real time based on metrics like CPU utilization, demonstrating this characteristic. On-demand self-service refers to a user provisioning resources without human interaction, but the core here is automated scaling in response to changing load. Broad network access is about accessing resources over the network from various devices. Resource pooling means the provider serves multiple customers from shared physical resources.
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.
Discussion
Loading comments…
Sign in to join the discussion.