CLF-C02 Billing, Pricing, and Support Practice Question
A company runs a steady, predictable workload on a diverse mix of Amazon EC2 instances spanning multiple instance families (e.g., M5, C5, R5) and AWS Regions. The company wants to maximize cost savings while retaining the ability to freely change instance families and Regions during the commitment term without losing the discount. Which AWS pricing model should the company use?
⚠ Common exam trap
A common mix-up: candidates confuse Reserved Instances with Savings Plans, assuming RIs offer similar flexibility, but RIs are region- and family-specific, whereas Compute Savings Plans provide full flexibility across families and regions.
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
✓
Compute Savings Plans
Compute Savings Plans (D) offer the highest flexibility by applying a discounted hourly commitment across any EC2 instance family, size, OS, tenancy, and region, automatically covering usage changes without losing the discount. This matches the requirement to freely change instance families and regions during the term while maximizing savings over On-Demand pricing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
On-Demand Instances
Why it's wrong here
On-Demand Instances are the wrong choice because they offer no long-term commitment but also no cost savings — you pay the full list price for every second of usage. For a steady, predictable workload that will run 24/7, On-Demand pricing will result in significantly higher costs over the year compared to any committed-use option. Although On-Demand gives you maximum flexibility and no risk of interruption, this option fails the company's stated cost-savings objective and provides no financial incentive for running a continuous, stable workload.
When this WOULD be correct
A company with an unpredictable, short-term workload that cannot commit to any term or upfront payment and needs maximum flexibility without any discount would choose On-Demand Instances.
- ✗
Reserved Instances
Why it's wrong here
Reserved Instances provide significant discounts but are tied to a specific instance family and Region. Changing instance families or Regions would require purchasing new reservations, forfeiting the discount on the original reservation. This does not offer the flexibility the company requires.
When this WOULD be correct
A company has a steady-state workload with predictable usage of a specific EC2 instance type (e.g., m5.large) in a single Region and wants the highest possible discount for that specific configuration, with no need to change instance families or Regions.
- ✗
Spot Instances
Why it's wrong here
Spot Instances are the wrong choice for this workload because they provide capacity that can be revoked at any time, often with only a two-minute warning, when AWS needs the capacity back. This means they are fundamentally unsuitable for a steady, predictable workload that must run continuously; an interruption would directly violate the company's requirement for uninterrupted operation. While Spot offers substantial discounts (up to 90%), those savings are only safe for fault-tolerant, stateless, or flexible workloads like batch processing, CI/CD test runs, or image rendering, not for a production workload that expects constant availability.
- ✓
Compute Savings Plans
Why this is correct
Compute Savings Plans provide the same discounts as Reserved Instances but with greater flexibility. They apply to any EC2 instance usage regardless of instance family, size, or Region, as long as the usage is within the committed dollar-per-hour amount. This matches the company's need for both cost savings and flexibility.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Compute Savings PlansCorrect answer▾
Why this is correct
Compute Savings Plans provide the same discounts as Reserved Instances but with greater flexibility. They apply to any EC2 instance usage regardless of instance family, size, or Region, as long as the usage is within the committed dollar-per-hour amount. This matches the company's need for both cost savings and flexibility.
✗On-Demand InstancesWrong answer — click to see why▾
Why this is wrong here
On-Demand Instances do not provide any discount; they charge full price per hour, so they cannot maximize cost savings for a steady, predictable workload.
★ When this WOULD be the correct answer
A company with an unpredictable, short-term workload that cannot commit to any term or upfront payment and needs maximum flexibility without any discount would choose On-Demand Instances.
Why candidates choose this
Candidates may think On-Demand offers flexibility to change instance families and regions, but they overlook that the question emphasizes cost savings, which On-Demand does not provide.
✗Reserved InstancesWrong answer — click to see why▾
Why this is wrong here
Reserved Instances require a commitment to a specific instance family and Region; they do not allow changing instance families or Regions without losing the discount, which contradicts the company's requirement for flexibility.
★ When this WOULD be the correct answer
A company has a steady-state workload with predictable usage of a specific EC2 instance type (e.g., m5.large) in a single Region and wants the highest possible discount for that specific configuration, with no need to change instance families or Regions.
Why candidates choose this
Candidates may think Reserved Instances are the best for steady workloads and cost savings, but they overlook the flexibility requirement, assuming Reserved Instances offer similar flexibility to Savings Plans.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Same concept, more angles
1 more way this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company runs multiple workloads on Amazon EC2 instances. They expect consistent usage for the next three years but want the flexibility to change instance families (for example, from M5 to C5) if performance requirements shift. Which AWS pricing model meets these requirements while providing a significant discount over On-Demand pricing?
medium- A.Reserved Instances (Standard)
- ✓ B.Compute Savings Plans
- C.EC2 Instance Savings Plans
- D.Spot Instances
Why B: Compute Savings Plans offer a significant discount (up to 66%) over On-Demand pricing in exchange for a commitment to a consistent amount of compute usage (measured in $/hour) for a 1- or 3-year term. Unlike Reserved Instances, Compute Savings Plans are flexible across instance families (e.g., M5 to C5), OS, and tenancy within a specific region, making them ideal for workloads that may need to change instance types over time while still receiving a discounted rate.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.