Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company has been running multiple workloads on AWS for over six months. The finance team needs to gain visibility into historical cost and usage data, identify which services are driving the most spend, forecast future monthly costs, and receive recommendations for purchasing Reserved Instances to achieve the highest savings. The team wants to use a native AWS tool that provides this functionality without requiring any third-party software. Which AWS tool should the finance team use?
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
AWS Trusted Advisor
AWS Trusted Advisor inspects your AWS environment and makes recommendations for saving money, improving system performance, and closing security gaps. However, it does not provide the deep historical cost analysis, forecasting, or Reserved Instance purchase recommendations that Cost Explorer offers. It can give cost optimization checks (e.g., idle instances) but not the granular cost trends and forecasting.
B
Distractor review
AWS Budgets
AWS Budgets allows you to set custom budgets to track your cost and usage and alerts you when you exceed (or are forecasted to exceed) your budget. It does not provide the comprehensive historical analysis, cost trends, or Reserved Instance recommendations that are needed.
C
Best answer
AWS Cost Explorer
AWS Cost Explorer has a default dashboard that gives you a view of your cost and usage over time. It enables you to filter by service, linked account, or tags, and provides forecasting up to 12 months ahead. Cost Explorer also provides Reserved Instance purchase recommendations based on your actual usage patterns, helping you maximize savings. This matches the finance team's requirements exactly.
D
Distractor review
AWS Pricing Calculator
AWS Pricing Calculator (formerly Simple Monthly Calculator) is used to estimate the cost of running a new workload or architecture. It is forward-looking and does not analyze existing historical usage or provide Reserved Instance recommendations based on past data.
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: AWS Cost Explorer — AWS Cost Explorer is the correct service for analyzing historical costs, forecasting future spending, and obtaining Reserved Instance purchase recommendations based on actual usage patterns. AWS Budgets only provides budget alerts, AWS Trusted Advisor offers general best-practice checks but not detailed cost trend analysis, and the AWS Pricing Calculator is designed for estimating costs of new workloads, not for analyzing existing usage.
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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