The most cost-effective way to serve the latest content through CloudFront without waiting for TTL expiration is to use file versioning in the URL, such as appending a unique query string or changing the object key. This approach guarantees that CloudFront treats each updated file as a new object, bypassing cached stale versions entirely and eliminating the need for costly cache invalidations. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this concept tests your understanding of CloudFront caching behavior and cost optimization, often appearing as a trap where candidates mistakenly choose reducing TTL or using invalidations. The key insight is that file versioning shifts the burden of freshness from cache management to the application layer, making it both automatic and free. Remember the mnemonic: “Version the URL, avoid the purge” — changing the URL is always cheaper than clearing the cache.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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.
A company is using Amazon CloudFront to serve content from an S3 origin. The content is updated infrequently. Users in some regions report seeing stale content. The company wants to ensure that users always see the latest version without waiting for TTL expiration. What is the MOST cost-effective solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use file versioning in the URL (e.g., appending a query string or using a unique object key).
Option D is correct because file versioning (changing the URL) guarantees fresh content without cache invalidation costs. Option A is wrong because it is costly and not automatic. Option B is wrong because reducing TTL increases origin load. Option C is wrong because it does not invalidate existing cache.
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.
✓
Use file versioning in the URL (e.g., appending a query string or using a unique object key).
Why this is correct
Unique URLs force CloudFront to fetch new content from origin.
Clue confirmation
The clue word "always" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set a very short TTL (e.g., 0 seconds) for the CloudFront distribution.
Why it's wrong here
This increases load on the origin and defeats caching benefits.
✗
Use an origin shield to reduce the number of requests to S3.
Why it's wrong here
Origin shield does not help with stale content.
✗
Create a CloudFront invalidation request for the changed files after each update.
Why it's wrong here
Invalidations incur costs and are manual.
Common exam traps
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.
Detailed technical explanation
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.
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 SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use file versioning in the URL (e.g., appending a query string or using a unique object key). — Option D is correct because file versioning (changing the URL) guarantees fresh content without cache invalidation costs. Option A is wrong because it is costly and not automatic. Option B is wrong because reducing TTL increases origin load. Option C is wrong because it does not invalidate existing cache.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
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 →
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 is using Amazon CloudFront with an S3 origin. They notice that users are receiving outdated content. What configuration change should be made to ensure users always get the latest content?
medium
A.Use signed URLs to serve content.
✓ B.Create an invalidation for the objects.
C.Enable compression on the S3 bucket.
D.Reduce the TTL to 0 in the CloudFront distribution.
Why B: Option D is correct because creating an invalidation removes cached objects. Option A is incorrect because TTL to 0 would increase origin load. Option B is incorrect because signed URLs control access, not cache. Option C is incorrect because compression doesn't affect freshness.
Last reviewed: Jun 20, 2026
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This SAP-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 SAP-C02 exam.
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