The answer is to unload the data from the existing cluster to S3, create a new encrypted cluster using the customer-managed KMS key, and reload the data. This is the only viable approach because encryption at rest for Amazon Redshift is a cluster-level attribute that must be set at creation time; it cannot be enabled retroactively on an existing, unencrypted cluster. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that Redshift’s encryption is immutable after provisioning, making the “unload, create, reload” workflow the most efficient method with minimal data loss. A common trap is assuming you can modify the cluster or use parameter groups to toggle encryption, but neither option is supported. Memory tip: think of Redshift encryption like a tattoo—you have to decide before you start, because you cannot add it later without starting over.
DBS-C01 Database Security Practice Question
This DBS-C01 practice question tests your understanding of database security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses Amazon Redshift for data warehousing. The security team requires that all data loaded into the cluster be encrypted at rest using a customer-managed KMS key. The cluster is currently unencrypted. What is the most efficient way to achieve this requirement with minimal data loss?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Unload the data from the existing cluster to S3, create a new encrypted cluster using the KMS key, and reload the data from S3.
Option B is correct because you cannot enable encryption on an existing Redshift cluster. You must unload data from the existing cluster, create a new encrypted cluster, and reload the data. Option A is wrong because encryption can only be set at cluster creation. Option C is wrong because modifying the cluster does not enable encryption. Option D is wrong because Redshift does not support enabling encryption via parameter groups.
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.
✓
Unload the data from the existing cluster to S3, create a new encrypted cluster using the KMS key, and reload the data from S3.
Why this is correct
This is the recommended approach to migrate data to an encrypted cluster.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the cluster parameter group to enable encryption.
Why it's wrong here
Parameter groups do not control encryption.
✗
Modify the cluster and enable encryption in the Redshift console.
Why it's wrong here
Encryption cannot be enabled on an existing cluster.
✗
Take a snapshot of the cluster, copy the snapshot with encryption, and restore from the encrypted snapshot.
Why it's wrong here
Redshift snapshots are not used to encrypt clusters; the cluster must be encrypted at creation.
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.
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.
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: Unload the data from the existing cluster to S3, create a new encrypted cluster using the KMS key, and reload the data from S3. — Option B is correct because you cannot enable encryption on an existing Redshift cluster. You must unload data from the existing cluster, create a new encrypted cluster, and reload the data. Option A is wrong because encryption can only be set at cluster creation. Option C is wrong because modifying the cluster does not enable encryption. Option D is wrong because Redshift does not support enabling encryption via parameter groups.
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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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. A company is using Amazon Redshift for data warehousing. They need to ensure that data is encrypted at rest using a customer-managed AWS KMS key. The cluster is currently unencrypted. What is the simplest way to enable encryption?
medium
✓ A.Create a new Redshift cluster with encryption enabled and migrate the data.
B.Enable encryption directly on the existing cluster using AWS CLI.
C.Create a snapshot of the existing cluster and restore it to a new encrypted cluster.
D.Modify the existing cluster and enable encryption using the Redshift console.
Why A: Option C is correct because you cannot enable encryption on an existing Redshift cluster. You must create a new cluster with encryption enabled, then copy data from the old cluster to the new one. Option A is wrong because modifying the cluster does not support encryption. Option B is wrong because you cannot directly encrypt an existing cluster. Option D is wrong because restoring from a snapshot to an encrypted target is possible, but you must first create an unencrypted snapshot and then restore to an encrypted cluster; however, the simplest method is to create a new encrypted cluster and copy data, as restoring a snapshot to a different cluster still requires creating a new cluster.
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This DBS-C01 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 DBS-C01 exam.
Question Discussion
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