- A
Availability Zones
Availability Zones are isolated locations within a Region, each with independent power, cooling, and networking. Deploying across multiple AZs provides high availability and fault tolerance against data center failures.
- B
Edge Locations
Why wrong: Edge Locations are used by Amazon CloudFront to cache content close to users for low latency. They are not designed for hosting compute or storage resources to achieve fault tolerance within a Region.
- C
AWS Local Zones
Why wrong: Local Zones are extensions of a Region that place compute and storage closer to end users for latency-sensitive workloads. They do not provide the same level of fault isolation within a Region as Availability Zones.
- D
AWS Regions
Why wrong: An AWS Region is a geographic area containing multiple Availability Zones. While a Region provides isolation from other Regions, deploying across multiple AZs within the same Region is the correct approach to protect against a single data center failure.
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company runs a critical e-commerce application in a single AWS Region. The architecture team wants to ensure the application remains available even if an entire data center fails. They plan to deploy the application across multiple physically separate and independent locations within that Region. Which component of the AWS global infrastructure should the team use to achieve this goal?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Availability Zones
Availability Zones (AZs) are physically separate and independent data centers within an AWS Region, each with isolated power, cooling, and networking. By deploying the application across multiple AZs, the architecture ensures that if one entire data center fails, the application continues to run in the other AZs, meeting the goal of high availability within a single Region.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Availability Zones
Why this is correct
Availability Zones are isolated locations within a Region, each with independent power, cooling, and networking. Deploying across multiple AZs provides high availability and fault tolerance against data center failures.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Edge Locations
Why it's wrong here
Edge Locations are used by Amazon CloudFront to cache content close to users for low latency. They are not designed for hosting compute or storage resources to achieve fault tolerance within a Region.
- ✗
AWS Local Zones
Why it's wrong here
Local Zones are extensions of a Region that place compute and storage closer to end users for latency-sensitive workloads. They do not provide the same level of fault isolation within a Region as Availability Zones.
- ✗
AWS Regions
Why it's wrong here
An AWS Region is a geographic area containing multiple Availability Zones. While a Region provides isolation from other Regions, deploying across multiple AZs within the same Region is the correct approach to protect against a single data center failure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Availability Zones with Edge Locations or Regions, mistakenly thinking Edge Locations provide compute failover or that deploying across Regions is required for high availability within a single geographic area.
Detailed technical explanation
How to think about this question
Each Availability Zone is one or more discrete data centers with redundant power, networking, and connectivity, and they are interconnected with high-bandwidth, low-latency links to support synchronous replication. Under the hood, AZs are isolated from each other to prevent cascading failures, and AWS recommends deploying at least two AZs for production workloads to achieve a Service Level Agreement (SLA) of 99.99% for Amazon EC2. A real-world scenario is an e-commerce site using an Auto Scaling group across three AZs with an Application Load Balancer, ensuring traffic is automatically rerouted if one AZ becomes unavailable.
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.
TExam Day Tips
- 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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Concepts — This question tests Cloud Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Availability Zones — Availability Zones (AZs) are physically separate and independent data centers within an AWS Region, each with isolated power, cooling, and networking. By deploying the application across multiple AZs, the architecture ensures that if one entire data center fails, the application continues to run in the other AZs, meeting the goal of high availability within a single Region.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLF-C02 exam.
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