- A
Enable point-in-time recovery (PITR) on the table.
PITR is required for cross-region restores.
- B
Enable DynamoDB global tables.
Why wrong: Global tables replicate live data, not backups.
- C
Export the table to S3 and copy the S3 objects to the destination Region.
Why wrong: This would require re-encryption with a new key.
- D
Create a multi-Region KMS key in the source and replicate it to the destination Region.
Multi-Region keys allow decryption in the destination.
- E
Create a CloudHSM key and use it for encryption.
Why wrong: DynamoDB does not support CloudHSM.
Question 1,294 of 1,730
DynamoDB Cross-Region Restore — Encrypted with KMS | AWS Database Specialty Explained
This DBS-C01 practice question tests your understanding of database security. 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 security engineer is designing a disaster recovery plan for an Amazon DynamoDB table that contains sensitive data. The table is encrypted using an AWS KMS customer managed key (CMK). The engineer needs to ensure that the table can be restored in a different AWS Region. Which TWO actions must be taken to enable cross-region restores with the same encryption? (Choose 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 point-in-time recovery (PITR) on the table.
To enable cross-region restores of an encrypted DynamoDB table, you need to have the table's backups available in the destination region. Cross-region restores require point-in-time recovery (PITR) to be enabled on the source table (Option A). Additionally, because the table uses a customer managed KMS key, you must create a multi-Region KMS key (or replicate the key) in the destination region so that DynamoDB can use it to decrypt the backup during restore (Option D). Option B (global tables) is for live replication, not for backup/restore scenarios. Option C (export to S3 and copy) does not preserve the same encryption because the exported data is not encrypted with the KMS key. Option E (CloudHSM) is not supported for DynamoDB encryption.
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 point-in-time recovery (PITR) on the table.
Why this is correct
PITR is required for cross-region restores.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable DynamoDB global tables.
Why it's wrong here
Global tables replicate live data, not backups.
- ✗
Export the table to S3 and copy the S3 objects to the destination Region.
Why it's wrong here
This would require re-encryption with a new key.
- ✓
Create a multi-Region KMS key in the source and replicate it to the destination Region.
Why this is correct
Multi-Region keys allow decryption in the destination.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a CloudHSM key and use it for encryption.
Why it's wrong here
DynamoDB does not support CloudHSM.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Database Security — This question tests Database Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable point-in-time recovery (PITR) on the table. — To enable cross-region restores of an encrypted DynamoDB table, you need to have the table's backups available in the destination region. Cross-region restores require point-in-time recovery (PITR) to be enabled on the source table (Option A). Additionally, because the table uses a customer managed KMS key, you must create a multi-Region KMS key (or replicate the key) in the destination region so that DynamoDB can use it to decrypt the backup during restore (Option D). Option B (global tables) is for live replication, not for backup/restore scenarios. Option C (export to S3 and copy) does not preserve the same encryption because the exported data is not encrypted with the KMS key. Option E (CloudHSM) is not supported for DynamoDB encryption.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 20, 2026
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