Quick Answer
The answer is S3 Standard-IA, as it is the most cost-effective storage class for infrequently accessed data that requires immediate retrieval. This class is specifically designed for a cost effective storage class infrequently accessed immediately retrievable use case, offering lower storage costs than S3 Standard while maintaining the same low-latency retrieval times. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your ability to distinguish between S3 storage classes based on access patterns and retrieval urgency, often appearing as a trap where candidates mistakenly choose Glacier Flexible Retrieval due to its lower storage cost. The key differentiator is that Glacier classes impose retrieval delays of minutes to hours, making them unsuitable for immediate access. Remember the memory tip: “Standard-IA: Infrequent Access, Instant Availability” — if the data must be available the moment you click, choose IA over Glacier.
This DEA-C01 practice question tests your understanding of data store management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 S3 to store large amounts of archival data. The data is accessed infrequently but must be immediately retrievable when needed. Which storage class is the most cost-effective choice?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
S3 Standard
Why wrong: Higher cost for infrequent access.
S3 Standard-IA
Designed for infrequently accessed data with immediate retrieval.
S3 Glacier Deep Archive
Why wrong: Has retrieval delays (12 hours).
S3 Intelligent-Tiering
Why wrong: Good for unknown patterns, but not best for known infrequent access.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
S3 Standard-IA
S3 Standard-IA is designed for infrequently accessed data that requires rapid access. S3 Glacier Flexible Retrieval and S3 Glacier Deep Archive have retrieval delays. S3 Standard is more expensive for infrequent access.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
S3 Standard
Why it's wrong here
Higher cost for infrequent access.
S3 Standard-IA
Why this is correct
Designed for infrequently accessed data with immediate retrieval.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
S3 Glacier Deep Archive
Why it's wrong here
Has retrieval delays (12 hours).
S3 Intelligent-Tiering
Why it's wrong here
Good for unknown patterns, but not best for known infrequent access.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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 — study guide chapter
Learn the concepts, then practise the questions
Data Store Management practice questions
Targeted practice on this topic area only
All DEA-C01 questions
1,786 questions across all exam domains
AWS Certified Data Engineer Associate DEA-C01 study guide
Full concept coverage aligned to exam objectives
DEA-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise DEA-C01 questions linked to Data Ingestion and Transformation.
Practise DEA-C01 questions linked to Data Operations and Support.
Practise DEA-C01 questions linked to Data Security and Governance.
Practise DEA-C01 questions linked to Data Store Management.
Practise DEA-C01 questions linked to DEA-C01 fundamentals.
Practise DEA-C01 questions linked to DEA-C01 scenario.
Practise DEA-C01 questions linked to DEA-C01 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
The correct answer is: S3 Standard-IA — S3 Standard-IA is designed for infrequently accessed data that requires rapid access. S3 Glacier Flexible Retrieval and S3 Glacier Deep Archive have retrieval delays. S3 Standard is more expensive for infrequent access.
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.
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 20, 2026
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
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.