Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is designing a critical web application that must remain available even if an entire data center goes offline due to a power outage. The application will run on Amazon EC2 instances in the us-east-1 Region. Which AWS infrastructure strategy should the company use to meet this high-availability requirement?
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
Launch all EC2 instances in a single Availability Zone to ensure low latency between instances.
This is incorrect because a single Availability Zone can fail entirely if its data center suffers an outage. Placing all instances in one AZ creates a single point of failure and does not provide high availability.
B
Best answer
Deploy the EC2 instances across two or more Availability Zones within the us-east-1 Region.
This is correct. Availability Zones are physically separate data centers within a Region. Running instances in multiple AZs ensures that the application remains available if one AZ goes offline, because the other AZs continue operating. This is a standard best practice for high availability.
C
Distractor review
Deploy the EC2 instances in multiple AWS Regions, such as us-east-1 and eu-west-1.
This is not the best answer for a data center outage. While multiple Regions protect against a Region-wide disaster, they introduce higher latency, complexity, and cost. The question specifies a data center failure within the same Region, which is best addressed by multiple Availability Zones, not multiple Regions.
D
Distractor review
Use separate AWS accounts for each EC2 instance to isolate the workload from a data center failure.
This is incorrect because AWS accounts are administrative boundaries, not physical infrastructure isolation. Instances in different accounts could still reside in the same Availability Zone and would be affected by a data center outage. AWS account separation does not provide fault tolerance against infrastructure failures.
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.
Related practice questions
Related CLF-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
AWS shared responsibility model practice questions
Practise CLF-C02 questions linked to AWS shared responsibility model.
AWS Cloud Practitioner cloud concepts practice questions
Practise CLF-C02 questions linked to AWS Cloud Practitioner cloud concepts.
AWS IAM practice questions
Practise CLF-C02 questions linked to AWS IAM.
AWS pricing practice questions
Practise CLF-C02 questions linked to AWS pricing.
AWS support plans practice questions
Practise CLF-C02 questions linked to AWS support plans.
AWS S3 practice questions
Practise CLF-C02 questions linked to AWS S3.
AWS EC2 practice questions
Practise CLF-C02 questions linked to AWS EC2.
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: Deploy the EC2 instances across two or more Availability Zones within the us-east-1 Region. — AWS Regions consist of multiple isolated locations known as Availability Zones (AZs). Each AZ contains one or more data centers with independent power, cooling, and networking. Deploying application instances across two or more AZs in the same Region ensures that if one AZ (data center) fails, the application continues to run in another AZ. This is the recommended approach for high availability against a data center outage within a single Region. Distributing instances within a single AZ does not provide fault tolerance. Using multiple Regions would protect against a Region-wide disaster but is unnecessary and more complex for a data center failure. Using different AWS accounts does not affect physical infrastructure resilience.
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.
Discussion
Loading comments…
Sign in to join the discussion.