The answer is to set longer Cache-Control max-age headers on the S3 objects. This configuration directly instructs CloudFront how long to retain objects in its edge caches, which is the most effective way to improve CloudFront cache hit ratio because it prevents the distribution from repeatedly re-fetching content from the origin. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of how HTTP caching headers control TTL behavior, a core concept for optimizing content delivery. A common trap is confusing Origin Shield, which reduces origin load but does not increase cache hits, with proper cache duration settings. Remember that query string parameters can fragment the cache and reduce hit ratios, while custom error responses have no impact on successful caching. A helpful memory tip: think of max-age as the “stay fresh” timer—the longer you set it, the more requests are served from the edge without needing to check the origin.
SOA-C02 Networking and Content Delivery Practice Question
This SOA-C02 practice question tests your understanding of networking and content delivery. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 distribute content globally. The origin is an S3 bucket. The SysOps administrator notices that cache hit ratio is low. Which configuration change would MOST improve the cache hit ratio?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set longer Cache-Control max-age headers on the S3 objects.
Option D is correct because setting appropriate Cache-Control headers (like max-age) on the objects tells CloudFront how long to cache them, directly increasing cache hits. Option A is wrong because enabling Origin Shield can reduce load on the origin but does not directly improve cache hit ratio; it aggregates requests. Option B is wrong because using query string parameters can fragment the cache if not configured properly, potentially reducing hit ratio. Option C is wrong because custom error responses do not affect caching of successful responses.
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 query string parameters to differentiate content.
Why it's wrong here
Query strings can create many cache objects, reducing the cache hit ratio unless they are forwarded and cached appropriately.
✗
Configure custom error responses for 404 errors.
Why it's wrong here
This does not affect caching of successful responses.
✓
Set longer Cache-Control max-age headers on the S3 objects.
Why this is correct
Longer cache durations mean objects are stored in edge caches for longer, increasing the likelihood of cache hits.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Origin Shield for the distribution.
Why it's wrong here
Origin Shield reduces origin load but does not directly increase cache hit ratio; it may even reduce it if not used with caching.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-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.
Networking and Content Delivery — This question tests Networking and Content Delivery — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set longer Cache-Control max-age headers on the S3 objects. — Option D is correct because setting appropriate Cache-Control headers (like max-age) on the objects tells CloudFront how long to cache them, directly increasing cache hits. Option A is wrong because enabling Origin Shield can reduce load on the origin but does not directly improve cache hit ratio; it aggregates requests. Option B is wrong because using query string parameters can fragment the cache if not configured properly, potentially reducing hit ratio. Option C is wrong because custom error responses do not affect caching of successful responses.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This SOA-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 SOA-C02 exam.
Question Discussion
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