- A
Keep the S3 bucket private, configure CloudFront with Origin Access Control so only CloudFront can access the origin, require signed cookies/URLs for viewers, and associate an AWS WAF web ACL with CloudFront for blocking and rate limiting.
This ensures S3 remains non-public while CloudFront becomes the only origin access path using Origin Access Control. Signed cookies/URLs enforce authenticated authorization at the edge for each request. Attaching AWS WAF adds request inspection and protections like rate limiting and exploit blocking.
- B
Enable public read access on the S3 bucket and rely on WAF alone for authorization because WAF can validate signatures.
Why wrong: WAF is not meant to replace authorization signatures for content protection, and public S3 access undermines security. Even if WAF blocks some traffic, public access allows requests that bypass your intended controls if misconfigured. Signed cookies/URLs are the appropriate edge authorization mechanism.
- C
Configure CloudFront with signed URLs but do not change the S3 bucket access settings; leaving public access enabled is acceptable since CloudFront can filter traffic.
Why wrong: If the S3 bucket remains public, clients can bypass CloudFront entirely by accessing the S3 object URLs directly. Signed URLs protect only requests going through CloudFront behaviors, not direct S3 origin access. The origin must be restricted so content cannot be retrieved outside CloudFront.
- D
Use WAF at CloudFront but omit signed cookies/URLs because rate limiting and exploit blocking already provide access control for private files.
Why wrong: WAF protections can reduce threats but do not implement business authorization for specific customers. Rate limiting and exploit blocking do not prevent an authorized user from sharing links or retrieving content without required authentication. Signed cookies/URLs are specifically for controlling content access.
Quick Answer
The answer is to keep the S3 bucket private, configure CloudFront with Origin Access Control so only CloudFront can reach the origin, require signed cookies or signed URLs for viewer access, and associate an AWS WAF web ACL with the CloudFront distribution. This design is correct because it enforces a layered security model: Origin Access Control (OAC) ensures the private S3 bucket rejects any direct requests, while signed cookies authenticate individual viewers, and WAF blocks common web exploits and rate-limits suspicious traffic at the edge before it reaches your origin. On the SAA-C03 exam, this scenario tests your understanding of combining CloudFront signed URLs/cookies with WAF and OAC—a common trap is forgetting to make the bucket private or using an outdated Origin Access Identity (OAI) instead of OAC. Remember the memory tip: “Private bucket, OAC, signed cookies, WAF at the edge—four layers of defense, one correct design.”
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You have an S3 bucket that stores customer-specific private files. You want to serve these files through CloudFront, where clients must use signed cookies (or signed URLs) to access the content. In addition, you need to block common web exploits and rate-limit suspicious traffic at the edge. Which design best meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
Keep the S3 bucket private, configure CloudFront with Origin Access Control so only CloudFront can access the origin, require signed cookies/URLs for viewers, and associate an AWS WAF web ACL with CloudFront for blocking and rate limiting.
Option A is correct because it combines a private S3 bucket with Origin Access Control (OAC) to ensure only CloudFront can access the origin, enforces signed cookies/URLs for viewer authentication, and uses AWS WAF at the edge to block common web exploits and rate-limit suspicious traffic. This layered approach provides both authorization (via signed requests) and security filtering (via WAF) at the CloudFront edge, meeting all requirements.
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.
- ✓
Keep the S3 bucket private, configure CloudFront with Origin Access Control so only CloudFront can access the origin, require signed cookies/URLs for viewers, and associate an AWS WAF web ACL with CloudFront for blocking and rate limiting.
Why this is correct
This ensures S3 remains non-public while CloudFront becomes the only origin access path using Origin Access Control. Signed cookies/URLs enforce authenticated authorization at the edge for each request. Attaching AWS WAF adds request inspection and protections like rate limiting and exploit blocking.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable public read access on the S3 bucket and rely on WAF alone for authorization because WAF can validate signatures.
Why it's wrong here
WAF is not meant to replace authorization signatures for content protection, and public S3 access undermines security. Even if WAF blocks some traffic, public access allows requests that bypass your intended controls if misconfigured. Signed cookies/URLs are the appropriate edge authorization mechanism.
- ✗
Configure CloudFront with signed URLs but do not change the S3 bucket access settings; leaving public access enabled is acceptable since CloudFront can filter traffic.
Why it's wrong here
If the S3 bucket remains public, clients can bypass CloudFront entirely by accessing the S3 object URLs directly. Signed URLs protect only requests going through CloudFront behaviors, not direct S3 origin access. The origin must be restricted so content cannot be retrieved outside CloudFront.
- ✗
Use WAF at CloudFront but omit signed cookies/URLs because rate limiting and exploit blocking already provide access control for private files.
Why it's wrong here
WAF protections can reduce threats but do not implement business authorization for specific customers. Rate limiting and exploit blocking do not prevent an authorized user from sharing links or retrieving content without required authentication. Signed cookies/URLs are specifically for controlling content access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think WAF can handle authorization (like validating signed URLs) or that leaving the S3 bucket public is acceptable if CloudFront is used, but WAF cannot verify cryptographic signatures and a public bucket allows direct access bypassing CloudFront's authentication.
Detailed technical explanation
How to think about this question
CloudFront signed URLs and signed cookies use RSA-SHA1 or RSA-SHA256 signatures generated with a CloudFront key pair, and the signature is validated by CloudFront before forwarding the request to the origin. When using Origin Access Control (OAC), CloudFront signs requests to S3 using AWS Signature Version 4, ensuring the bucket policy can restrict access to only the CloudFront distribution's OAC principal. A common real-world scenario is serving paywalled video content where WAF rate limiting prevents brute-force attempts on signed URLs while OAC prevents direct S3 access.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Design Secure Architectures — study guide chapter
Learn the concepts, then practise the questions
- →
Design Secure Architectures practice questions
Targeted practice on this topic area only
- →
All SAA-C03 questions
1,040 questions across all exam domains
- →
SAA-C03 study guide
Full concept coverage aligned to exam objectives
- →
SAA-C03 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related SAA-C03 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Design Secure Architectures practice questions
Practise SAA-C03 questions linked to Design Secure Architectures.
Design Resilient Architectures practice questions
Practise SAA-C03 questions linked to Design Resilient Architectures.
Design High-Performing Architectures practice questions
Practise SAA-C03 questions linked to Design High-Performing Architectures.
Design Cost-Optimized Architectures practice questions
Practise SAA-C03 questions linked to Design Cost-Optimized Architectures.
SAA-C03 VPC practice questions
Practise SAA-C03 questions linked to SAA-C03 VPC.
SAA-C03 S3 lifecycle policy questions
Practise SAA-C03 questions linked to SAA-C03 S3 lifecycle policy questions.
SAA-C03 RDS Multi-AZ questions
Practise SAA-C03 questions linked to SAA-C03 RDS Multi-AZ questions.
SAA-C03 IAM policy practice questions
Practise SAA-C03 questions linked to SAA-C03 IAM policy.
SAA-C03 Route 53 failover questions
Practise SAA-C03 questions linked to SAA-C03 Route 53 failover questions.
SAA-C03 CloudFront practice questions
Practise SAA-C03 questions linked to SAA-C03 CloudFront.
SAA-C03 NAT gateway questions
Practise SAA-C03 questions linked to SAA-C03 NAT gateway questions.
SAA-C03 VPC endpoint questions
Practise SAA-C03 questions linked to SAA-C03 VPC endpoint questions.
Practice this exam
Start a free SAA-C03 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Keep the S3 bucket private, configure CloudFront with Origin Access Control so only CloudFront can access the origin, require signed cookies/URLs for viewers, and associate an AWS WAF web ACL with CloudFront for blocking and rate limiting. — Option A is correct because it combines a private S3 bucket with Origin Access Control (OAC) to ensure only CloudFront can access the origin, enforces signed cookies/URLs for viewer authentication, and uses AWS WAF at the edge to block common web exploits and rate-limit suspicious traffic. This layered approach provides both authorization (via signed requests) and security filtering (via WAF) at the CloudFront edge, meeting all requirements.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
Keep practising
More SAA-C03 practice questions
- A content publishing system uses Lambda functions that call an unreliable third-party API. Failed events must be retaine…
- A startup runs two EC2-based workloads in the same AWS Region. Its customer-facing API is always on, and its nightly vid…
- A warehouse integration service must use shared file storage across Linux EC2 instances in multiple Availability Zones.…
- A team runs a stateless web app on Amazon EC2 behind an Application Load Balancer. During traffic spikes, new EC2 instan…
- A service in private subnets downloads product images from Amazon S3 and stores job state in DynamoDB. A NAT Gateway is…
- A static site is hosted in Amazon S3 and delivered by CloudFront. After a frontend release, the same JavaScript bundles…
Last reviewed: Jun 11, 2026
This SAA-C03 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 SAA-C03 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.