- A
S3 Bucket Policy with IP-based restrictions
Why wrong: Bucket policies can restrict access by IP but require the requester to have AWS credentials — they don't provide temporary credential-free access for external partners.
- B
S3 Access Points
Why wrong: Access Points simplify managing access for shared datasets within AWS — they don't provide credential-free temporary access for external parties.
- C
S3 Pre-signed URLs
Pre-signed URLs embed the generator's credentials and expiration time — the recipient accesses the specific object without needing AWS credentials, and access expires automatically.
- D
S3 Bucket public-read ACL
Why wrong: Making a bucket public grants permanent access to anyone — pre-signed URLs provide temporary, object-specific access with automatic expiration.
Quick Answer
The answer is S3 Pre-signed URLs, which grant temporary access to a specific S3 object for a defined duration—in this case, 24 hours—without requiring the recipient to possess AWS credentials. This works because the URL is cryptographically signed with the bucket owner’s AWS signature, embedding the necessary permissions directly into the link, so the business partner can simply use the URL to download the object. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of secure, time-limited access mechanisms, often appearing in scenarios where you need to share data externally without exposing IAM keys. A common trap is confusing pre-signed URLs with S3 bucket policies or ACLs, but remember that only pre-signed URLs provide object-specific, time-bound access for unauthenticated users. Memory tip: think of it as a “temporary ticket” for one file—valid for hours, not forever.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 needs to generate a pre-signed URL to allow a business partner to download a specific S3 object for 24 hours without requiring AWS credentials. Which S3 feature enables this?
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 Pre-signed URLs
Pre-signed URLs grant temporary access to a specific S3 object by embedding credentials in a URL signed with the bucket owner's AWS signature. The URL is valid for a specified duration (up to 7 days, here 24 hours) and allows the partner to download the object without having AWS credentials. This is the only S3 feature that provides time-limited, object-specific access without requiring the partner to authenticate with AWS.
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 IP-based restrictions
Why it's wrong here
Bucket policies can restrict access by IP but require the requester to have AWS credentials — they don't provide temporary credential-free access for external partners.
- ✗
S3 Access Points
Why it's wrong here
Access Points simplify managing access for shared datasets within AWS — they don't provide credential-free temporary access for external parties.
- ✓
S3 Pre-signed URLs
Why this is correct
Pre-signed URLs embed the generator's credentials and expiration time — the recipient accesses the specific object without needing AWS credentials, and access expires automatically.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Bucket public-read ACL
Why it's wrong here
Making a bucket public grants permanent access to anyone — pre-signed URLs provide temporary, object-specific access with automatic expiration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse pre-signed URLs with bucket policies or ACLs, thinking those can also grant temporary access, but they lack the time-limited, credential-free delegation that pre-signed URLs uniquely provide.
Detailed technical explanation
How to think about this question
A pre-signed URL is generated by signing a request with the AWS Signature Version 4 (SigV4) process, using the bucket owner's access key and secret key. The URL includes query parameters such as X-Amz-Algorithm, X-Amz-Credential, X-Amz-SignedHeaders, X-Amz-Expires, and X-Amz-Signature; the expiration value is in seconds (max 604800 for 7 days). Under the hood, the signature is computed over the request's canonical form, ensuring that only the specified object, HTTP method (e.g., GET), and expiration window are allowed.
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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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Pre-signed URLs — Pre-signed URLs grant temporary access to a specific S3 object by embedding credentials in a URL signed with the bucket owner's AWS signature. The URL is valid for a specified duration (up to 7 days, here 24 hours) and allows the partner to download the object without having AWS credentials. This is the only S3 feature that provides time-limited, object-specific access without requiring the partner to authenticate with AWS.
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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