- A
S3 Standard.
Standard offers the best performance for frequently accessed data and no retrieval fees.
- B
S3 Intelligent-Tiering.
Why wrong: Intelligent-Tiering has a per-object monitoring cost; Standard is cheaper for frequent access.
- C
S3 Standard-IA.
Why wrong: Standard-IA incurs retrieval fees and is not cost-effective for frequent access.
- D
S3 Glacier Instant Retrieval.
Why wrong: Glacier Instant Retrieval is for rarely accessed data and has higher storage cost than Standard.
Question 1,643 of 1,786
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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 data engineer needs to store clickstream data from a web application in Amazon S3. Each event is about 5 KB, and the application generates 1 million events per hour. The data is used for real-time analytics and also for batch processing. The engineer wants to minimize storage costs while ensuring that data is available for real-time queries as soon as it is written. Which storage class should the engineer use for the S3 bucket?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
✓
S3 Standard.
S3 Standard is the correct choice because it offers low-latency (milliseconds) first-byte-out performance, making data available for real-time queries immediately after writing. It also supports both real-time analytics and batch processing without retrieval fees, and at 5 KB per event with 1 million events per hour (approximately 5 GB/hour or 120 GB/day), the storage cost is manageable compared to the frequent access pattern. S3 Standard is optimized for frequently accessed data and provides the durability and availability needed for clickstream analytics.
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.
- ✓
S3 Standard.
Why this is correct
Standard offers the best performance for frequently accessed data and no retrieval fees.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Intelligent-Tiering.
Why it's wrong here
Intelligent-Tiering has a per-object monitoring cost; Standard is cheaper for frequent access.
- ✗
S3 Standard-IA.
Why it's wrong here
Standard-IA incurs retrieval fees and is not cost-effective for frequent access.
- ✗
S3 Glacier Instant Retrieval.
Why it's wrong here
Glacier Instant Retrieval is for rarely accessed data and has higher storage cost than Standard.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The DEA-C01 exam often tests the misconception that S3 Intelligent-Tiering automatically optimizes costs for all workloads, but the trap here is that the per-object monitoring fee and potential tier transitions make it more expensive than S3 Standard for high-volume, small-object, frequently accessed data like clickstream events.
Detailed technical explanation
How to think about this question
S3 Standard provides read-after-write consistency for PUTS of new objects, which is critical for real-time analytics pipelines like Amazon Kinesis or Apache Kafka that consume data as soon as it lands. The 5 KB event size is below the S3 Standard-IA minimum billable size of 128 KB, meaning S3 Standard charges only for the actual data stored, whereas IA would round up each object to 128 KB, inflating costs by over 25x. Additionally, S3 Standard has no retrieval fees, unlike Standard-IA and Glacier Instant Retrieval, which charge per GB retrieved, making frequent access expensive.
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 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 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 DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Standard. — S3 Standard is the correct choice because it offers low-latency (milliseconds) first-byte-out performance, making data available for real-time queries immediately after writing. It also supports both real-time analytics and batch processing without retrieval fees, and at 5 KB per event with 1 million events per hour (approximately 5 GB/hour or 120 GB/day), the storage cost is manageable compared to the frequent access pattern. S3 Standard is optimized for frequently accessed data and provides the durability and availability needed for clickstream analytics.
What should I do if I get this DEA-C01 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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 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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