Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company has a web application that processes user-uploaded images. When a user uploads an image, the application needs to resize the image into multiple formats (thumbnail, medium, large). The company wants to avoid managing servers and wants the image processing to execute only when a new image is uploaded. The solution must automatically scale to handle thousands of concurrent uploads. Which AWS service should the company use to perform the image processing?
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
Amazon EC2 Auto Scaling group
EC2 Auto Scaling groups manage the number of EC2 instances, but they require ongoing server management and are not inherently event-driven to respond to individual image uploads. Using EC2 for this task would involve unnecessary overhead and cost.
B
Best answer
AWS Lambda
AWS Lambda is a serverless compute service that runs code in response to triggers, such as an S3 upload event. It scales automatically and charges only for execution duration, making it perfect for short-lived, sporadic image processing tasks.
C
Distractor review
Amazon ECS with Fargate launch type
While Amazon ECS with Fargate is serverless and can run containers, it is not as straightforward or cost-effective for simple, event-driven image resizing. ECS is more suited for long-running or batch container workloads, not for instantly responding to individual events.
D
Distractor review
AWS Elastic Beanstalk
Elastic Beanstalk is a platform as a service (PaaS) that automates the deployment and scaling of applications on managed servers. It requires a continuously running application environment and is not designed to execute code only in response to specific events like image uploads.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
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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?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: AWS Lambda — AWS Lambda is a serverless compute service that runs code in response to events, such as an object upload to Amazon S3. It automatically scales to handle thousands of concurrent executions, requires no server management, and charges only for the compute time used. This makes it ideal for short-lived, event-driven tasks like image resizing. Amazon EC2 Auto Scaling groups require managing servers and are not directly event-driven. Amazon ECS with Fargate is container-based and better suited for long-running applications. AWS Elastic Beanstalk manages server environments and is not inherently event-driven.
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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