Quick Answer
The answer is S3 One Zone-IA, S3 Standard, and S3 Standard-IA. These three are valid storage classes because Amazon S3 organizes its offerings by access frequency, resilience, and retrieval cost: S3 Standard is designed for frequently accessed data with low latency and high throughput, S3 Standard-IA provides lower storage costs for infrequently accessed data with a retrieval fee, and S3 One Zone-IA stores data in a single Availability Zone for even lower cost at the expense of resilience. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your ability to distinguish between the core S3 storage classes versus deprecated or non-existent options like “S3 Reduced Redundancy” or “S3 Glacier Instant Retrieval” (which is a separate class). A common trap is confusing S3 Intelligent-Tiering as a storage class—it is actually an auto-tiering feature, not a class itself. To remember the valid trio, think “Standard, Standard-IA, One Zone-IA” as the three foundational tiers before moving into Glacier and Deep Archive.
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.
Which THREE of the following are valid storage classes in Amazon S3? (Choose THREE.)
S3 Standard
S3 Standard is a general-purpose storage class.
S3 Archive
Why wrong: 'S3 Archive' is not a valid storage class; S3 Glacier is.
S3 Intelligent-Tiering
Intelligent-Tiering automatically moves data between access tiers.
S3 Cold
Why wrong: 'S3 Cold' is not a valid storage class.
S3 One Zone-IA
One Zone-IA is for infrequently accessed data in a single AZ.
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
S3 Standard is a valid storage class designed for frequently accessed data with low latency and high throughput. It offers 99.999999999% durability and 99.99% availability, making it suitable for a wide range of use cases like cloud applications, dynamic websites, and content distribution.
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 this is correct
S3 Standard is a general-purpose storage class.
Related concept
Read the scenario before looking for a memorised answer.
S3 Archive
Why it's wrong here
'S3 Archive' is not a valid storage class; S3 Glacier is.
S3 Intelligent-Tiering
Why this is correct
Intelligent-Tiering automatically moves data between access tiers.
Related concept
Read the scenario before looking for a memorised answer.
S3 Cold
Why it's wrong here
'S3 Cold' is not a valid storage class.
S3 One Zone-IA
Why this is correct
One Zone-IA is for infrequently accessed data in a single AZ.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
AWS often tests the distinction between valid S3 storage classes and fabricated names like 'S3 Archive' or 'S3 Cold', expecting candidates to recall the exact naming conventions (e.g., S3 Glacier, S3 Glacier Deep Archive) rather than generic terms.
Detailed technical explanation
S3 storage classes are optimized for different access patterns and cost profiles. S3 Standard uses multiple geographically distributed Availability Zones to provide high durability and availability, while S3 One Zone-IA stores data in a single AZ, reducing cost but risking data loss if that AZ fails. S3 Intelligent-Tiering automatically moves objects between access tiers (frequent, infrequent, and archive instant access) based on changing access patterns, with a small monthly monitoring fee per object.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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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 — S3 Standard is a valid storage class designed for frequently accessed data with low latency and high throughput. It offers 99.999999999% durability and 99.99% availability, making it suitable for a wide range of use cases like cloud applications, dynamic websites, and content distribution.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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.
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