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Question 796 of 1,616

Troubleshooting and Optimization →easyMultiple ChoiceObjective-mapped

DVA-C02 Troubleshooting and Optimization Practice Question

This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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 developer is optimizing an S3 bucket that stores large CSV files for analytics. The files are accessed frequently for the first 30 days, then rarely accessed. After 90 days, the data must be retained for compliance but accessed infrequently. What is the MOST cost-effective lifecycle policy?

Clue words in this question

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

Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

A
Use S3 Intelligent-Tiering to automatically move data between access tiers.
Why wrong: S3 Intelligent-Tiering has monitoring costs and is not optimal when access patterns are predictable; it's better to use lifecycle rules.
B
Transition to S3 One Zone-IA after 30 days, then delete after 90 days.
Why wrong: S3 One Zone-IA is less durable (single AZ) and not suitable for compliance data that must be retained.
C
Transition to S3 Standard-IA after 30 days, then to S3 Glacier Deep Archive after 90 days.
Correct. Standard-IA after 30 days reduces cost for infrequent access, then Glacier Deep Archive after 90 days provides lowest cost for long-term retention.
D
Transition to S3 Glacier Flexible Retrieval after 30 days, then to S3 Glacier Deep Archive after 90 days.
Why wrong: Glacier Flexible Retrieval after 30 days is too costly for the access pattern—Standard-IA is cheaper for the first 90 days, then Deep Archive for long-term.

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

✓

Transition to S3 Standard-IA after 30 days, then to S3 Glacier Deep Archive after 90 days.

Option C is correct because it transitions to S3 Standard-IA after 30 days (when access becomes infrequent) and then to S3 Glacier Deep Archive after 90 days (for long-term compliance at lowest cost). This matches the access pattern: frequent for first 30 days, then rarely accessed, then after 90 days infrequent access for compliance. Option A (Intelligent-Tiering) is not the most cost-effective because it incurs monitoring costs and is designed for unknown or changing access patterns, but here the pattern is known. Option B (One Zone-IA then delete) is not suitable because it deletes after 90 days, but data must be retained for compliance. Also One Zone-IA has lower durability. Option D (Glacier Flexible Retrieval after 30 days then Deep Archive after 90 days) is not cost-effective because transitioning to Glacier Flexible Retrieval after 30 days would incur higher retrieval costs and longer access times for the first 90 days, and it's better to use Standard-IA for that period.

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.

✗
Use S3 Intelligent-Tiering to automatically move data between access tiers.
Why it's wrong here
S3 Intelligent-Tiering has monitoring costs and is not optimal when access patterns are predictable; it's better to use lifecycle rules.
✗
Transition to S3 One Zone-IA after 30 days, then delete after 90 days.
Why it's wrong here
S3 One Zone-IA is less durable (single AZ) and not suitable for compliance data that must be retained.
✓
Transition to S3 Standard-IA after 30 days, then to S3 Glacier Deep Archive after 90 days.
Why this is correct
Correct. Standard-IA after 30 days reduces cost for infrequent access, then Glacier Deep Archive after 90 days provides lowest cost for long-term retention.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Transition to S3 Glacier Flexible Retrieval after 30 days, then to S3 Glacier Deep Archive after 90 days.
Why it's wrong here
Glacier Flexible Retrieval after 30 days is too costly for the access pattern—Standard-IA is cheaper for the first 90 days, then Deep Archive for long-term.

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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.

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 DVA-C02 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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Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

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FAQ

Questions learners often ask

What does this DVA-C02 question test?

Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Transition to S3 Standard-IA after 30 days, then to S3 Glacier Deep Archive after 90 days. — Option C is correct because it transitions to S3 Standard-IA after 30 days (when access becomes infrequent) and then to S3 Glacier Deep Archive after 90 days (for long-term compliance at lowest cost). This matches the access pattern: frequent for first 30 days, then rarely accessed, then after 90 days infrequent access for compliance. Option A (Intelligent-Tiering) is not the most cost-effective because it incurs monitoring costs and is designed for unknown or changing access patterns, but here the pattern is known. Option B (One Zone-IA then delete) is not suitable because it deletes after 90 days, but data must be retained for compliance. Also One Zone-IA has lower durability. Option D (Glacier Flexible Retrieval after 30 days then Deep Archive after 90 days) is not cost-effective because transitioning to Glacier Flexible Retrieval after 30 days would incur higher retrieval costs and longer access times for the first 90 days, and it's better to use Standard-IA for that period.

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

Are there clue words in this question I should notice?

Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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