Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A retail company uses Amazon EC2 Auto Scaling to automatically launch hundreds of EC2 instances when CPU utilization exceeds 70% during a flash sale. When traffic subsides, the Auto Scaling group terminates the excess instances. This ability to dynamically provision and release compute resources in response to changes in demand best demonstrates which fundamental characteristic of cloud computing?
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
Broad network access
Broad network access means resources are available over the network and can be accessed by standard clients (e.g., mobile phones, laptops). The scenario focuses on scaling capacity, not network accessibility.
B
Distractor review
Resource pooling
Resource pooling is the provider's ability to serve multiple customers using a multi-tenant model, with physical and virtual resources dynamically assigned. The scenario does not describe multi-tenancy or shared infrastructure; it describes scaling up and down.
C
Best answer
Rapid elasticity
Rapid elasticity is the ability to provision and release cloud resources quickly, often automatically, to scale in and out with demand. The Auto Scaling behavior shown in the scenario is a direct example of this characteristic.
D
Distractor review
Measured service
Measured service involves metering resource usage, monitoring, and providing transparency for billing. While AWS does measure usage for billing, the scenario is primarily about automatic scaling in response to load, not about monitoring or reporting usage.
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.
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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Rapid elasticity — The scenario demonstrates rapid elasticity, which is the ability to scale resources up and down quickly and automatically to match demand. This is one of the five essential characteristics of cloud computing defined by NIST. Broad network access refers to resources being accessible over the network by standard mechanisms. Resource pooling describes the provider serving multiple customers from shared physical and virtual resources. Measured service refers to the metering and reporting of resource usage for billing and optimization.
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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