- A
S3 Object Lock
Why wrong: S3 Object Lock prevents objects from being deleted or overwritten for a fixed period (WORM). It is primarily for compliance rather than recovery from accidental deletion by team members.
- B
S3 Cross-Region Replication
Why wrong: Cross-Region Replication copies objects to another region for disaster recovery. It does not by itself enable recovery of previously deleted or overwritten objects in the source bucket.
- C
S3 Versioning
S3 Versioning maintains multiple versions of each object. A deletion adds a delete marker and keeps the previous versions, which can be restored. Overwrites create a new version without removing the old one.
- D
S3 Intelligent-Tiering
Why wrong: S3 Intelligent-Tiering automatically moves objects between access tiers based on usage patterns. It is a cost optimisation feature, not a version recovery mechanism.
S3 Versioning Protect Accidental Deletion
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 development team accidentally deletes important files from an Amazon S3 bucket. The company wants to protect against accidental deletions and overwrites in the future, allowing recovery of previous versions of objects. Which S3 feature should they enable?
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 Versioning
S3 Versioning is the correct feature because it preserves every version of an object, including overwrites and deletions. When versioning is enabled, deleting an object only adds a delete marker, and previous versions remain recoverable. This directly addresses the requirement to protect against accidental deletions and overwrites by allowing restoration of earlier object versions.
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 Object Lock
Why it's wrong here
S3 Object Lock prevents objects from being deleted or overwritten for a fixed period (WORM). It is primarily for compliance rather than recovery from accidental deletion by team members.
- ✗
S3 Cross-Region Replication
Why it's wrong here
Cross-Region Replication copies objects to another region for disaster recovery. It does not by itself enable recovery of previously deleted or overwritten objects in the source bucket.
- ✓
S3 Versioning
Why this is correct
S3 Versioning maintains multiple versions of each object. A deletion adds a delete marker and keeps the previous versions, which can be restored. Overwrites create a new version without removing the old one.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Intelligent-Tiering
Why it's wrong here
S3 Intelligent-Tiering automatically moves objects between access tiers based on usage patterns. It is a cost optimisation feature, not a version recovery mechanism.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 Object Lock with versioning, thinking that locking objects prevents deletion entirely, but Object Lock only enforces retention periods and does not provide the ability to recover from accidental deletions or overwrites after they occur.
Detailed technical explanation
How to think about this question
When S3 Versioning is enabled, each object is assigned a unique version ID. Deleting an object creates a delete marker (a zero-byte object with a version ID), and the underlying data remains intact. To permanently delete an object, you must specify its version ID; otherwise, you can remove the delete marker to restore the object. This feature also allows retrieval of overwritten objects by accessing their previous version IDs directly via the AWS CLI, SDK, or S3 console.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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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 Versioning — S3 Versioning is the correct feature because it preserves every version of an object, including overwrites and deletions. When versioning is enabled, deleting an object only adds a delete marker, and previous versions remain recoverable. This directly addresses the requirement to protect against accidental deletions and overwrites by allowing restoration of earlier object versions.
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.
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 →
Same concept, more angles
1 more ways this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which Amazon S3 feature protects against accidental deletion by maintaining multiple versions of every object in a bucket?
easy- A.S3 Replication
- ✓ B.S3 Versioning
- C.S3 Object Lock
- D.S3 Lifecycle policies
Why B: S3 Versioning is the correct answer because it is the specific S3 feature designed to protect against accidental deletion by preserving multiple versions of every object in a bucket. When versioning is enabled, deleting an object does not permanently remove it; instead, S3 inserts a delete marker, and the previous versions remain recoverable. This directly addresses the scenario of preventing permanent data loss from accidental deletions.
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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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