SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. 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. A key principle to apply: cloudFront caches content at edge locations globally.. 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 inventory service exposes a static website from S3 and CloudFront. Users should still receive cached pages if the S3 origin has a short outage. Which feature helps most? The design must avoid adding custom operational scripts.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CloudFront caching with appropriate TTLs
CloudFront caches responses at edge locations based on configured TTLs (Cache-Control or Expires headers). If the S3 origin becomes temporarily unavailable, CloudFront can still serve stale or cached content to users, maintaining availability without any custom scripts or failover logic. This directly addresses the requirement to serve cached pages during short S3 outages.
Key principle: CloudFront caches content at edge locations globally.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
CloudFront caching with appropriate TTLs
Why this is correct
CloudFront can serve cached content from edge locations when the origin is temporarily unavailable.
Related concept
CloudFront caches content at edge locations globally.
✗
AWS Backup Vault Lock
Why it's wrong here
Backup Vault Lock protects backups, not CloudFront delivery.
✗
IAM Access Analyzer
Why it's wrong here
Access Analyzer reviews permissions and does not serve cached content.
✗
S3 Select
Why it's wrong here
S3 Select retrieves subsets of object data and does not increase origin outage tolerance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates might think AWS Backup Vault Lock (Option B) provides some form of data availability or failover, but it is purely a compliance and retention tool with no impact on serving cached web content during origin outages.
Detailed technical explanation
How to think about this question
CloudFront's origin failover mechanism can be configured with a primary and secondary origin, but even without that, cached objects with appropriate TTLs (e.g., 24 hours) allow CloudFront to serve stale responses (via the 'stale-while-revalidate' directive) while asynchronously refreshing from the origin. This behavior is governed by the Cache-Control and Expires headers from the origin, and CloudFront respects these headers by default unless overridden by a custom policy. In a real-world scenario, setting a minimum TTL of 0 and default TTL of 86400 seconds ensures that even if S3 is down for minutes, users see the last cached version.
KKey Concepts to Remember
CloudFront caches content at edge locations globally.
TTL (Time-To-Live) determines how long content is cached before revalidation.
CloudFront can serve stale content if the origin is unreachable.
Caching improves performance and increases origin availability.
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
CloudFront caches content at edge locations globally.
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.
Review cloudFront caches content at edge locations globally., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design Resilient Architectures — This question tests Design Resilient Architectures — CloudFront caches content at edge locations globally..
What is the correct answer to this question?
The correct answer is: CloudFront caching with appropriate TTLs — CloudFront caches responses at edge locations based on configured TTLs (Cache-Control or Expires headers). If the S3 origin becomes temporarily unavailable, CloudFront can still serve stale or cached content to users, maintaining availability without any custom scripts or failover logic. This directly addresses the requirement to serve cached pages during short S3 outages.
What should I do if I get this SAA-C03 question wrong?
Review cloudFront caches content at edge locations globally., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
CloudFront caches content at edge locations globally.
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Question Discussion
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