The answer is that Amazon S3 pricing works on a pay-as-you-go model where you are charged per GB stored, per request, and for outbound data transfer. This is correct because AWS bills for each granular component of usage: storage costs are calculated per gigabyte per month based on the storage class, request costs apply to operations like PUT, GET, and LIST, and data transfer charges only apply to traffic leaving AWS to the internet. On the AWS Certified Cloud Practitioner CLF-C02 exam, this concept tests your understanding of the shared responsibility model’s billing side and often appears as a distractor where a wrong option claims inbound transfer is charged. A common trap is assuming all data transfer is free, but remember that inbound is free while outbound incurs costs. Memory tip: think “S3 = Store, Request, Send” — you pay for keeping it, touching it, and moving it out.
CLF-C02 Billing, Pricing, and Support Practice Question
This CLF-C02 practice question tests your understanding of billing, pricing, and support. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which statement correctly describes how Amazon S3 pricing works?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
S3 charges per GB stored, per request, and for outbound data transfer
Amazon S3 pricing is based on a pay-as-you-go model where you are charged for the amount of storage you use (per GB per month), the number and type of requests (e.g., PUT, GET, LIST), and data transfer out to the internet. This granular billing reflects actual usage, making option B correct.
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.
✗
S3 charges a flat monthly fee regardless of storage used
Why it's wrong here
S3 uses pay-per-use tiered pricing based on actual GB stored — there's no flat monthly fee.
✓
S3 charges per GB stored, per request, and for outbound data transfer
Why this is correct
S3 bills for storage consumed (per GB/month, tiered), requests made (per thousand), and data transferred out of S3 to the internet or other Regions.
Related concept
Read the scenario before looking for a memorised answer.
✗
S3 storage is free; only data transfer is charged
Why it's wrong here
Both storage and data transfer are charged — S3 is not free for storage consumption.
✗
S3 charges by the number of files stored, not the size
Why it's wrong here
S3 charges by total GB stored, not by file count — a million 1-byte files costs less than one 1 TB file.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume S3 pricing is purely based on storage volume, forgetting that request costs and data transfer out are significant components, especially for high-traffic or frequently accessed data.
Detailed technical explanation
How to think about this question
Under the hood, S3 pricing tiers include Standard, Infrequent Access, and Glacier, each with different per-GB storage costs and retrieval fees. For example, S3 Standard charges $0.023 per GB for the first 50 TB/month, while S3 Glacier Deep Archive costs $0.00099 per GB, but with higher retrieval costs. A real-world scenario: a company storing 10 TB of log files in S3 Standard would pay ~$230/month for storage, plus additional costs for PUT requests (e.g., $0.005 per 1,000 requests) and data transfer out if users download logs.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
Billing, Pricing, and Support — This question tests Billing, Pricing, and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 charges per GB stored, per request, and for outbound data transfer — Amazon S3 pricing is based on a pay-as-you-go model where you are charged for the amount of storage you use (per GB per month), the number and type of requests (e.g., PUT, GET, LIST), and data transfer out to the internet. This granular billing reflects actual usage, making option B correct.
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.
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Question Discussion
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