- A
S3 bucket policy with a condition that restricts access by IP address
Why wrong: An S3 bucket policy with an IP address condition would allow requests from that IP, but requests still require valid AWS credentials (e.g., Signature V4) unless the bucket is made public. This does not provide a simple time-limited link for a user without credentials, and it would open access to all objects from that IP, not just the specific file.
- B
IAM role with cross-account access for the auditor's AWS account
Why wrong: An IAM role with cross-account access requires the auditor to have an AWS account and to assume the role. The auditor does not have an AWS account, so this option does not meet the requirement. Moreover, it would grant access to all resources the role allows, not a single time-limited download.
- C
S3 presigned URL generated with a 48-hour expiration
An S3 presigned URL is the correct solution. It allows the company to generate a URL that provides temporary access to a specific S3 object. The URL includes a signature that expires after the specified time (48 hours). The auditor can simply use the URL to download the file without needing AWS credentials or any other authentication, and the bucket remains private.
- D
CloudFront signed URL using a trusted key group
Why wrong: A CloudFront signed URL can also provide temporary access, but it requires a CloudFront distribution configured for the S3 bucket. The question does not indicate that the company uses CloudFront, and implementing a distribution adds unnecessary complexity. An S3 presigned URL is the simpler, direct feature designed for this exact use case without needing additional services.
Quick Answer
The answer is an S3 presigned URL generated with a 48-hour expiration. This feature allows you to grant time-limited S3 object access to an external auditor without an AWS account by embedding temporary authentication credentials directly into the URL, so the auditor can download the file via HTTPS without needing any AWS credentials or making the bucket public. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of how presigned URLs provide secure, temporary access for external parties, often appearing as a distractor against making a bucket public or using IAM roles. A common trap is confusing presigned URLs with bucket policies or pre-signed cookies, but remember that presigned URLs are for individual objects and specific time windows. Memory tip: think of a presigned URL as a “digital hall pass” that expires after a set period, granting entry to exactly one file without requiring the visitor to show ID.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. 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.
A company stores sensitive audit reports in an Amazon S3 bucket. An external auditor needs to download a specific report for a compliance review. The auditor does not have an AWS account and will only need access for 48 hours. The company wants to provide a secure, time-limited link that allows the auditor to download the file directly from S3 without making the bucket public or requiring the auditor to authenticate with AWS. Which AWS feature should the company use to meet these requirements?
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
S3 presigned URL generated with a 48-hour expiration
An S3 presigned URL allows the company to grant temporary, time-limited access to a specific object in a private S3 bucket without requiring the auditor to have AWS credentials. By generating the URL with a 48-hour expiration, the company meets the exact requirement for secure, time-bound access. The auditor can download the file directly via HTTPS using the presigned URL, which embeds the necessary authentication information.
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 bucket policy with a condition that restricts access by IP address
Why it's wrong here
An S3 bucket policy with an IP address condition would allow requests from that IP, but requests still require valid AWS credentials (e.g., Signature V4) unless the bucket is made public. This does not provide a simple time-limited link for a user without credentials, and it would open access to all objects from that IP, not just the specific file.
- ✗
IAM role with cross-account access for the auditor's AWS account
Why it's wrong here
An IAM role with cross-account access requires the auditor to have an AWS account and to assume the role. The auditor does not have an AWS account, so this option does not meet the requirement. Moreover, it would grant access to all resources the role allows, not a single time-limited download.
- ✓
S3 presigned URL generated with a 48-hour expiration
Why this is correct
An S3 presigned URL is the correct solution. It allows the company to generate a URL that provides temporary access to a specific S3 object. The URL includes a signature that expires after the specified time (48 hours). The auditor can simply use the URL to download the file without needing AWS credentials or any other authentication, and the bucket remains private.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
CloudFront signed URL using a trusted key group
Why it's wrong here
A CloudFront signed URL can also provide temporary access, but it requires a CloudFront distribution configured for the S3 bucket. The question does not indicate that the company uses CloudFront, and implementing a distribution adds unnecessary complexity. An S3 presigned URL is the simpler, direct feature designed for this exact use case without needing additional services.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may overcomplicate the solution by choosing CloudFront signed URLs (Option D) because they associate signed URLs with security, but the question explicitly requires a direct S3 download without additional services, making the simpler S3 presigned URL the correct choice.
Detailed technical explanation
How to think about this question
An S3 presigned URL is generated by signing a request with the bucket owner's AWS credentials (using AWS Signature Version 4) and embedding the expiration timestamp. The URL includes query parameters such as X-Amz-Algorithm, X-Amz-Credential, X-Amz-SignedHeaders, and X-Amz-Expires, which together allow the bearer to perform a specific action (e.g., GET) on the object. A subtle behavior is that the maximum expiration for a presigned URL is 7 days (604,800 seconds) when using AWS Signature Version 4, so a 48-hour expiration is well within limits.
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.
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Security and Compliance — study guide chapter
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 presigned URL generated with a 48-hour expiration — An S3 presigned URL allows the company to grant temporary, time-limited access to a specific object in a private S3 bucket without requiring the auditor to have AWS credentials. By generating the URL with a 48-hour expiration, the company meets the exact requirement for secure, time-bound access. The auditor can download the file directly via HTTPS using the presigned URL, which embeds the necessary authentication information.
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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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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