- A
Enable bucket versioning on the S3 bucket.
Versioning preserves prior object versions so accidental deletes and overwrites can be recovered later.
- B
Turn on S3 Transfer Acceleration for the bucket.
Why wrong: Transfer Acceleration can speed uploads over long distances, but it does not protect object history or durability.
- C
Use only lifecycle policies to move objects to Glacier.
Why wrong: Lifecycle policies control storage class transitions and cost, but they do not create a regional recovery copy.
- D
Configure replication to a bucket in a second AWS Region.
Cross-Region replication creates a second copy outside the original Region, improving recovery options after a regional outage.
- E
Enable S3 Block Public Access on the bucket.
Why wrong: Block Public Access helps prevent accidental exposure, but it does not protect against deletion or create a second Region copy.
SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: s3 Versioning preserves multiple versions of an object in the same bucket.. 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 media company stores daily financial exports in Amazon S3. The files must be protected against accidental overwrite or deletion, and the business also wants a second copy in another Region for recovery after a regional outage. Which two actions should the architect take? Select two.
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
Enable bucket versioning on the S3 bucket.
Option A is correct because enabling S3 Versioning protects objects from accidental overwrite or deletion by preserving previous versions. When a file is overwritten or deleted, the original version is retained, allowing recovery. This directly addresses the requirement to guard against data loss from user or application errors.
Key principle: S3 Versioning preserves multiple versions of an object in the same bucket.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable bucket versioning on the S3 bucket.
Why this is correct
Versioning preserves prior object versions so accidental deletes and overwrites can be recovered later.
Related concept
S3 Versioning preserves multiple versions of an object in the same bucket.
- ✗
Turn on S3 Transfer Acceleration for the bucket.
Why it's wrong here
Transfer Acceleration can speed uploads over long distances, but it does not protect object history or durability.
- ✗
Use only lifecycle policies to move objects to Glacier.
Why it's wrong here
Lifecycle policies control storage class transitions and cost, but they do not create a regional recovery copy.
- ✓
Configure replication to a bucket in a second AWS Region.
Why this is correct
Cross-Region replication creates a second copy outside the original Region, improving recovery options after a regional outage.
Related concept
S3 Versioning preserves multiple versions of an object in the same bucket.
- ✗
Enable S3 Block Public Access on the bucket.
Why it's wrong here
Block Public Access helps prevent accidental exposure, but it does not protect against deletion or create a second Region copy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse S3 Transfer Acceleration or lifecycle policies with data protection features, overlooking that versioning and replication are the specific services designed for accidental deletion prevention and cross-region recovery.
Detailed technical explanation
How to think about this question
S3 Versioning works by assigning a unique version ID to each object upload; when an object is deleted, a delete marker is added instead of removing the underlying data. Cross-region replication (CRR) asynchronously copies objects to a destination bucket in another Region, using S3's internal replication engine that can replicate both new and existing objects if configured with a replication rule. Together, versioning and CRR provide both version-level recovery and geographic redundancy, meeting the stated requirements.
KKey Concepts to Remember
- S3 Versioning preserves multiple versions of an object in the same bucket.
- Versioning protects against accidental overwrites and deletions.
- S3 Replication copies objects to a destination bucket in another AWS Region.
- Replication provides disaster recovery for regional outages.
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
S3 Versioning preserves multiple versions of an object in the same bucket.
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
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Review s3 Versioning preserves multiple versions of an object in the same bucket., then practise related SAA-C03 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Resilient Architectures — This question tests Design Resilient Architectures — S3 Versioning preserves multiple versions of an object in the same bucket..
What is the correct answer to this question?
The correct answer is: Enable bucket versioning on the S3 bucket. — Option A is correct because enabling S3 Versioning protects objects from accidental overwrite or deletion by preserving previous versions. When a file is overwritten or deleted, the original version is retained, allowing recovery. This directly addresses the requirement to guard against data loss from user or application errors.
What should I do if I get this SAA-C03 question wrong?
Review s3 Versioning preserves multiple versions of an object in the same bucket., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
S3 Versioning preserves multiple versions of an object in the same bucket.
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Last reviewed: Jun 11, 2026
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