This DEA-C01 practice question tests your understanding of data store management. 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 company is using Amazon DynamoDB to store session data for a web application. The data engineer needs to ensure that the data is encrypted at rest. Which action should the data engineer take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure encryption at rest is enabled on the DynamoDB table (default).
Option B is correct because DynamoDB supports encryption at rest using AWS KMS, and it is enabled by default. Option A is wrong because DynamoDB Accelerator (DAX) does not provide encryption at rest for the underlying table. Option C is wrong because enabling encryption on the client side is unnecessary and adds complexity. Option D is wrong because the question is about encryption at rest, not TTL.
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 encryption at rest on the DynamoDB Accelerator (DAX) cluster.
Why it's wrong here
DAX is a cache, not the primary storage; encryption at rest is for the table.
✗
Use client-side encryption before writing to DynamoDB.
Why it's wrong here
Client-side encryption is an option but not necessary; server-side encryption is default.
✓
Ensure encryption at rest is enabled on the DynamoDB table (default).
Why this is correct
DynamoDB encrypts at rest by default using AWS KMS.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable DynamoDB Time to Live (TTL) to encrypt data.
Why it's wrong here
TTL is for automatic deletion, not encryption.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which DEA-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.
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure encryption at rest is enabled on the DynamoDB table (default). — Option B is correct because DynamoDB supports encryption at rest using AWS KMS, and it is enabled by default. Option A is wrong because DynamoDB Accelerator (DAX) does not provide encryption at rest for the underlying table. Option C is wrong because enabling encryption on the client side is unnecessary and adds complexity. Option D is wrong because the question is about encryption at rest, not TTL.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-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.
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This DEA-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 DEA-C01 exam.
Question Discussion
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