- A
Operational Excellence
Why wrong: Operational Excellence is about running and improving operational procedures. Eliminating waste, right-sizing, and selecting pricing models are Cost Optimisation activities.
- B
Reliability
Why wrong: Reliability is about system recovery and availability. Cost reduction through right-sizing and pricing model selection is Cost Optimisation.
- C
Cost Optimisation
The Cost Optimisation pillar covers eliminating unused resources, right-sizing instances, selecting appropriate pricing models (Reserved vs On-Demand), and using managed services to reduce total cost.
- D
Security
Why wrong: Security focuses on protecting data and systems. Cost reduction activities like right-sizing are Cost Optimisation, not Security.
Question 608 of 1,024
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 finance team works with architects to eliminate unused EC2 instances, right-size over-provisioned resources, replace On-Demand instances with Reserved Instances for stable workloads, and adopt managed services to reduce operational overhead. Which AWS Well-Architected Framework pillar guides these activities?
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
✓
Cost Optimisation
Option C is correct because the Cost Optimization pillar of the AWS Well-Architected Framework focuses on eliminating unused resources, right-sizing over-provisioned instances, using Reserved Instances for predictable workloads, and adopting managed services to reduce operational overhead. These activities directly target cost efficiency by aligning resource usage with demand and avoiding waste.
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.
- ✗
Operational Excellence
Why it's wrong here
Operational Excellence is about running and improving operational procedures. Eliminating waste, right-sizing, and selecting pricing models are Cost Optimisation activities.
- ✗
Reliability
Why it's wrong here
Reliability is about system recovery and availability. Cost reduction through right-sizing and pricing model selection is Cost Optimisation.
- ✓
Cost Optimisation
Why this is correct
The Cost Optimisation pillar covers eliminating unused resources, right-sizing instances, selecting appropriate pricing models (Reserved vs On-Demand), and using managed services to reduce total cost.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Security
Why it's wrong here
Security focuses on protecting data and systems. Cost reduction activities like right-sizing are Cost Optimisation, not Security.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Cost Optimization with Operational Excellence, as both involve improving efficiency, but Cost Optimization specifically targets financial savings through resource and pricing optimization, not process automation or reliability improvements.
Detailed technical explanation
How to think about this question
The Cost Optimization pillar includes practices like using AWS Cost Explorer to identify idle resources, applying AWS Compute Optimizer for right-sizing recommendations, and leveraging Reserved Instances (which offer up to 72% discount over On-Demand) for stable workloads. Managed services like Amazon RDS reduce operational overhead by automating patching and backups, shifting costs from administrative labor to predictable service fees.
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
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Cloud Concepts — study guide chapter
Learn the concepts, then practise the questions
- →
Cloud Concepts practice questions
Targeted practice on this topic area only
- →
All CLF-C02 questions
1,024 questions across all exam domains
- →
AWS Certified Cloud Practitioner CLF-C02 study guide
Full concept coverage aligned to exam objectives
- →
CLF-C02 practice test guide
How to use practice tests most effectively before exam day
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.
Cloud Concepts practice questions
Practise CLF-C02 questions linked to Cloud Concepts.
Security and Compliance practice questions
Practise CLF-C02 questions linked to Security and Compliance.
Cloud Technology and Services practice questions
Practise CLF-C02 questions linked to Cloud Technology and Services.
Billing, Pricing, and Support practice questions
Practise CLF-C02 questions linked to Billing, Pricing, and Support.
AWS shared responsibility model practice questions
Practise CLF-C02 questions linked to AWS shared responsibility model.
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.
Practice this exam
Start a free CLF-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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: Cost Optimisation — Option C is correct because the Cost Optimization pillar of the AWS Well-Architected Framework focuses on eliminating unused resources, right-sizing over-provisioned instances, using Reserved Instances for predictable workloads, and adopting managed services to reduce operational overhead. These activities directly target cost efficiency by aligning resource usage with demand and avoiding waste.
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 →
Keep practising
More CLF-C02 practice questions
- A company publishes a message each time a new product is added to its catalogue. Three services need to receive this mes…
- A media company stores frequently accessed video thumbnails in Amazon S3. The thumbnails are read multiple times every d…
- A company needs a service to translate domain names (like www.example.com) into IP addresses, check the health of their…
- A startup runs an application on AWS and receives a monthly bill that charges exactly for the number of compute hours us…
- A financial institution runs its core banking application on-premises due to regulatory requirements. It has connected i…
- A company wants to run a MySQL database in AWS without managing database software installation, applying patches, settin…
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.