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Reliability and Business Continuity →easyMultiple ChoiceObjective-mapped

SOA-C02 Reliability and Business Continuity Practice Question

This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 AWS CloudTrail to log API activity. The SysOps administrator needs to ensure that log files are protected from accidental deletion and are available for compliance audits for at least 7 years. Which service should be used to meet these requirements?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

A
Enable S3 Object Lock in Compliance mode.
Compliance mode prevents any user from deleting or overwriting objects for the retention period.
B
Enable S3 Versioning on the CloudTrail S3 bucket.
Why wrong: Versioning preserves previous versions but does not prevent deletion of the current version.
C
Move CloudTrail logs to Amazon S3 Glacier after 90 days.
Why wrong: Glacier does not provide WORM protection by default.
D
Store logs in Amazon CloudWatch Logs with an expiration policy of 7 years.
Why wrong: CloudWatch Logs can retain logs but does not offer WORM protection.

Full breakdown with real-world context →

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 S3 Object Lock in Compliance mode.

S3 Object Lock in Compliance mode provides a write-once-read-many (WORM) model that prevents any user, including the AWS account root user, from deleting or overwriting objects for the specified retention period. This meets both the protection from accidental deletion and the 7-year compliance audit requirement, as the retention mode cannot be shortened or removed once applied.

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 S3 Object Lock in Compliance mode.
Why this is correct
Compliance mode prevents any user from deleting or overwriting objects for the retention period.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 Versioning on the CloudTrail S3 bucket.
Why it's wrong here
Versioning preserves previous versions but does not prevent deletion of the current version.
✗
Move CloudTrail logs to Amazon S3 Glacier after 90 days.
Why it's wrong here
Glacier does not provide WORM protection by default.
✗
Store logs in Amazon CloudWatch Logs with an expiration policy of 7 years.
Why it's wrong here
CloudWatch Logs can retain logs but does not offer WORM protection.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse versioning (which only preserves copies) with immutability (which prevents deletion entirely), or they assume that moving data to a cold storage tier like Glacier automatically protects it from deletion, when in fact Glacier objects are still deletable without an additional lock mechanism.

Detailed technical explanation

How to think about this question

S3 Object Lock in Compliance mode uses a retention period defined in days or years; once set, the retention mode cannot be changed, and the retention date cannot be shortened by any user, including root. This is enforced at the S3 API level, where any PutObject or DeleteObject request that would violate the lock is rejected with an AccessDenied error. For compliance audits, the lock ensures that logs remain immutable and auditable for the full 7-year period, even if the bucket is accidentally deleted (the bucket itself cannot be deleted while locked objects exist).

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.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Enable S3 Object Lock in Compliance mode. — S3 Object Lock in Compliance mode provides a write-once-read-many (WORM) model that prevents any user, including the AWS account root user, from deleting or overwriting objects for the specified retention period. This meets both the protection from accidental deletion and the 7-year compliance audit requirement, as the retention mode cannot be shortened or removed once applied.

What should I do if I get this SOA-C02 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This SOA-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 SOA-C02 exam.