- 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. 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 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 on the bucket protects objects from accidental overwrite or deletion by preserving previous versions of each object. When versioning is enabled, a delete marker is placed instead of permanently removing the object, and overwrites create a new version while retaining the old one. This directly meets the requirement to guard against accidental data loss.
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.
- ✓
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
Read the scenario before looking for a memorised answer.
- ✗
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.
When this WOULD be correct
A company needs to upload large files from multiple global locations to a central S3 bucket and requires faster upload speeds. Enabling Transfer Acceleration would be the correct action to reduce upload latency.
- ✗
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.
When this WOULD be correct
An architect needs to reduce storage costs for infrequently accessed data that must be retained for compliance, with no requirement for immediate retrieval or cross-region redundancy.
- ✓
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
Read the scenario before looking for a memorised answer.
- ✗
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.
When this WOULD be correct
An exam question where the requirement is to prevent public access to sensitive data stored in S3, such as financial records or personal information, and no other access controls are specified.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The SAA-C03 exam frequently reuses these exact scenarios with slightly different constraints.
✓Enable bucket versioning on the S3 bucket.Correct answer▾
Why this is correct
Versioning preserves prior object versions so accidental deletes and overwrites can be recovered later.
✗Turn on S3 Transfer Acceleration for the bucket.Wrong answer — click to see why▾
Why this is wrong here
S3 Transfer Acceleration speeds up uploads over long distances but does not protect against accidental deletion or overwrite, nor does it create a cross-region copy for disaster recovery.
★ When this WOULD be the correct answer
A company needs to upload large files from multiple global locations to a central S3 bucket and requires faster upload speeds. Enabling Transfer Acceleration would be the correct action to reduce upload latency.
Why candidates choose this
Candidates may confuse 'acceleration' with 'protection' or think it helps with replication, not realizing it only optimizes data transfer speed, not durability or availability.
✗Use only lifecycle policies to move objects to Glacier.Wrong answer — click to see why▾
Why this is wrong here
Lifecycle policies to move objects to Glacier provide cost optimization for long-term storage, but do not protect against accidental overwrite/deletion or provide cross-region recovery.
★ When this WOULD be the correct answer
An architect needs to reduce storage costs for infrequently accessed data that must be retained for compliance, with no requirement for immediate retrieval or cross-region redundancy.
Why candidates choose this
Candidates may confuse lifecycle policies with data protection mechanisms, assuming moving to Glacier inherently secures data, or they may think Glacier's durability alone addresses the requirements.
✗Enable S3 Block Public Access on the bucket.Wrong answer — click to see why▾
Why this is wrong here
Block Public Access prevents public access to S3 objects but does not protect against accidental overwrite or deletion by authorized users, nor does it provide cross-region replication for disaster recovery.
★ When this WOULD be the correct answer
An exam question where the requirement is to prevent public access to sensitive data stored in S3, such as financial records or personal information, and no other access controls are specified.
Why candidates choose this
Candidates may mistakenly think Block Public Access provides general data protection, confusing it with versioning or replication features that actually prevent overwrites and enable recovery.
Analysis generated from the official SAA-C03blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse S3 Transfer Acceleration or Block Public Access with data protection features, when in fact only versioning and replication directly address the requirements for preventing accidental deletion and providing 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 overwritten, the previous version is retained and can be restored via the S3 API or console. Cross-Region Replication (CRR) automatically replicates objects to a destination bucket in a different AWS Region, ensuring a second copy exists for disaster recovery; CRR requires versioning to be enabled on both source and destination buckets. In a real-world scenario, combining versioning with CRR provides both point-in-time recovery from accidental changes and geographic redundancy for regional outages.
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 SAA-C03 question test?
Design Resilient Architectures — This question tests Design Resilient Architectures — Read the scenario before looking for a memorised answer..
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 on the bucket protects objects from accidental overwrite or deletion by preserving previous versions of each object. When versioning is enabled, a delete marker is placed instead of permanently removing the object, and overwrites create a new version while retaining the old one. This directly meets the requirement to guard against accidental data loss.
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.
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
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