This DVA-C02 practice question tests your understanding of 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.
Which THREE practices help protect data at rest in Amazon S3?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable MFA Delete.
B is correct because enabling MFA Delete on an S3 bucket requires multi-factor authentication for permanent deletion of object versions, adding an extra layer of security to protect data at rest from accidental or malicious deletion. This directly safeguards the durability and integrity of stored data.
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 versioning.
Why it's wrong here
Versioning preserves object versions but does not encrypt data.
✓
Enable MFA Delete.
Why this is correct
MFA Delete requires multi-factor authentication to delete objects, adding a layer of protection.
Related concept
Read the scenario before looking for a memorised answer.
Read the scenario before looking for a memorised answer.
✗
Enable cross-region replication.
Why it's wrong here
Replication copies data to another region but does not encrypt it.
✓
Use bucket policies to deny uploads without encryption headers.
Why this is correct
Bucket policies can enforce that objects must be uploaded with encryption settings.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse versioning (which provides data protection through object recovery) with data-at-rest security (which requires encryption or access controls like MFA Delete), leading them to select versioning as a valid practice for protecting data at rest.
Detailed technical explanation
How to think about this question
Server-side encryption (SSE) encrypts objects at rest using AES-256, with options for S3-managed keys (SSE-S3), AWS KMS (SSE-KMS), or customer-provided keys (SSE-C). Bucket policies can enforce encryption by denying PutObject requests that lack the x-amz-server-side-encryption header, ensuring all uploads are encrypted before storage. MFA Delete works with versioning to require a time-based one-time password (TOTP) from a hardware or virtual MFA device for permanent version deletions, protecting against unauthorized data destruction.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable MFA Delete. — B is correct because enabling MFA Delete on an S3 bucket requires multi-factor authentication for permanent deletion of object versions, adding an extra layer of security to protect data at rest from accidental or malicious deletion. This directly safeguards the durability and integrity of stored data.
What should I do if I get this DVA-C02 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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This DVA-C02 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 DVA-C02 exam.
Question Discussion
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