Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company has been using Amazon EC2 instances for a production application for the past 12 months. The finance team wants to understand historical spending patterns and identify opportunities to reduce costs. Specifically, they need to see which EC2 instance families and sizes are being underutilized and get recommendations for purchasing Reserved Instances to save money compared to current On-Demand pricing. The team wants to use a native AWS tool that provides a visual dashboard of costs, usage trends, and actionable recommendations. 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 Budgets
AWS Budgets allows you to set spending limits and receive alerts when costs exceed thresholds, but it does not provide historical cost analysis, usage trends, or Reserved Instance recommendations. It is not designed for exploring past spending or identifying specific optimization opportunities.
B
Distractor review
AWS Trusted Advisor
AWS Trusted Advisor includes cost optimization checks and can suggest Reserved Instances, but it lacks a detailed historical cost and usage dashboard. It does not offer the same granularity for analyzing trends over time or visualizing spending by instance family.
C
Best answer
AWS Cost Explorer
AWS Cost Explorer is the correct tool. It provides an interactive dashboard of historical costs and usage, allows filtering by EC2 instance family, and generates Reserved Instance purchase recommendations based on your past usage. It is specifically designed for cost analysis and optimization.
D
Distractor review
AWS Compute Optimizer
AWS Compute Optimizer provides right-sizing recommendations based on instance utilization metrics, but it does not analyze cost history or provide Reserved Instance recommendations. While it helps reduce costs by suggesting instance type changes, it does not fulfill the requirement for historical spending analysis.
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 primary tool for analyzing historical cost and usage data. It provides a visual dashboard with filters for services, instance families, and time periods, and includes built-in Reserved Instance recommendations based on past usage patterns. AWS Budgets focuses on setting thresholds and alerts, not historical analysis. AWS Trusted Advisor offers cost optimization checks but lacks comprehensive historical dashboards. AWS Compute Optimizer provides right-sizing recommendations based on utilization but does not analyze cost history or offer Reserved Instance recommendations. Therefore, AWS Cost Explorer is the correct choice for both historical cost visualization and actionable cost-saving recommendations.
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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