Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company needs to run a data processing job that typically takes 2 hours to complete. The job is stateless and can be parallelized across multiple workers. The company wants to minimize operational overhead and only pay for the compute time consumed. The job runs only once a month. Which AWS compute service should the company 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 Lambda
AWS Lambda has a maximum execution timeout of 15 minutes (900 seconds). A job that takes 2 hours cannot run on Lambda, so this option is invalid.
B
Distractor review
Amazon EC2 Spot Instances
While Spot Instances can be cost-effective, using EC2 directly to run a batch job requires the company to manage instance provisioning, Auto Scaling, monitoring, and job scheduling. This results in significantly higher operational overhead compared to using a fully managed service like AWS Batch.
C
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AWS Fargate
AWS Fargate is a serverless compute engine for containers that removes the need to manage underlying servers. However, it does not include built-in job scheduling, queue management, or automatic scaling for batch jobs. To run a batch workload on Fargate, the company would need to set up an orchestrator (e.g., Amazon ECS with custom scheduling) and handle job dependencies, increasing complexity vs. AWS Batch.
D
Best answer
AWS Batch
AWS Batch is purpose-built for batch computing. It automatically provisions the required compute resources (including Spot Instances) based on job requirements, manages job queues, retries, and dependencies. The company pays only for the underlying compute resources consumed. This combination of minimal operational overhead and pay-per-use pricing makes AWS Batch the best fit for this scenario.
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 Batch — AWS Batch is a fully managed batch computing service that dynamically provisions the optimal quantity and type of compute resources based on the volume and resource requirements of the batch jobs submitted. It integrates with Amazon EC2 and Spot Instances to reduce costs, and you pay only for the AWS resources (e.g., EC2 instances) consumed. For a long-running batch job that runs infrequently, AWS Batch provides the most operational efficiency and cost savings. AWS Lambda has a maximum execution timeout of 15 minutes, so it cannot run a 2-hour job. Amazon EC2 Spot Instances would require manual or automated management of instance lifecycles, Auto Scaling groups, and job scheduling, leading to higher operational overhead compared to AWS Batch. AWS Fargate is a serverless compute engine for containers, but it lacks the job scheduling, queueing, and dependency management features that AWS Batch offers natively for batch workloads.
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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