- A
S3 Transfer Acceleration
Why wrong: Transfer Acceleration speeds up uploads over long distances but does not provide immutability or streaming-specific benefits.
- B
S3 Lifecycle policies to transition data to Amazon S3 Glacier
Lifecycle policies automate data movement, cost-effectively managing the data lifecycle.
- C
S3 Multipart Upload API
Multipart Upload allows large objects to be uploaded in parts, improving throughput for streaming ingestion.
- D
S3 Object Lock in governance mode
Object Lock prevents objects from being deleted or overwritten for a specified period, providing immutability.
- E
S3 Cross-Region Replication (CRR)
Why wrong: CRR copies objects to another region for redundancy, but is not a core requirement for immutability or streaming ingestion.
Quick Answer
The correct answer combines S3 Object Lock in governance mode, S3 Multipart Upload API, and S3 Lifecycle policies to transition data to S3 Glacier. S3 Object Lock enforces immutability by preventing objects from being deleted or overwritten during a fixed retention period, which is critical for compliance and audit-ready data lakes. The S3 Multipart Upload API supports high-throughput streaming ingestion by breaking large objects into parallel parts, enabling faster uploads and resilience against network failures. S3 Lifecycle policies then automate cost-effective tiering to Glacier for rarely accessed immutable data, balancing performance with storage costs. On the AWS Certified Data Engineer Associate DEA-C01 exam, this scenario tests your ability to combine write-once-read-many (WORM) protection with ingestion scalability and lifecycle management. A common trap is selecting S3 Transfer Acceleration, which improves speed but does not enforce immutability. Memory tip: think “Lock, Upload, Lifecycle” for immutable, high-throughput, cost-efficient data lakes.
DEA-C01 Data Store Management Practice Question
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 data engineer is designing a data lake on Amazon S3. The data must be immutable and support high-throughput streaming ingestion. Which THREE features should the engineer consider? (Select THREE.)
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 Lifecycle policies to transition data to Amazon S3 Glacier
S3 Object Lock in governance mode (Option D) is correct because it enforces immutability by preventing objects from being deleted or overwritten for a specified retention period, which is essential for a data lake requiring immutable data. S3 Multipart Upload API (Option C) is correct because it enables high-throughput streaming ingestion by allowing large objects to be uploaded in parallel parts, improving throughput and resilience. S3 Lifecycle policies to transition data to Amazon S3 Glacier (Option B) is correct because it supports cost-effective storage management for immutable data that is rarely accessed, aligning with the data lake's lifecycle needs.
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 Transfer Acceleration
Why it's wrong here
Transfer Acceleration speeds up uploads over long distances but does not provide immutability or streaming-specific benefits.
- ✓
S3 Lifecycle policies to transition data to Amazon S3 Glacier
Why this is correct
Lifecycle policies automate data movement, cost-effectively managing the data lifecycle.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
S3 Multipart Upload API
Why this is correct
Multipart Upload allows large objects to be uploaded in parts, improving throughput for streaming ingestion.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
S3 Object Lock in governance mode
Why this is correct
Object Lock prevents objects from being deleted or overwritten for a specified period, providing immutability.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Cross-Region Replication (CRR)
Why it's wrong here
CRR copies objects to another region for redundancy, but is not a core requirement for immutability or streaming ingestion.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 Transfer Acceleration (a speed optimization) with a feature that provides immutability or streaming support, leading them to select it incorrectly, while overlooking that S3 Object Lock and Multipart Upload directly address the core requirements of immutability and high-throughput ingestion.
Detailed technical explanation
How to think about this question
S3 Object Lock in governance mode allows users with specific IAM permissions (e.g., s3:BypassGovernanceRetention) to override retention settings, which is useful for administrative flexibility while maintaining immutability for most users. The Multipart Upload API uses a unique upload ID and ETag for each part, enabling parallel uploads and resumable transfers, which is critical for streaming ingestion where data arrives continuously. Lifecycle policies can transition objects to S3 Glacier after a specified period, leveraging the 90-day minimum storage duration for Glacier to reduce costs while preserving immutability through write-once-read-many (WORM) behavior.
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.
What to study next
Got this wrong? Here's your next step.
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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 Lifecycle policies to transition data to Amazon S3 Glacier — S3 Object Lock in governance mode (Option D) is correct because it enforces immutability by preventing objects from being deleted or overwritten for a specified retention period, which is essential for a data lake requiring immutable data. S3 Multipart Upload API (Option C) is correct because it enables high-throughput streaming ingestion by allowing large objects to be uploaded in parallel parts, improving throughput and resilience. S3 Lifecycle policies to transition data to Amazon S3 Glacier (Option B) is correct because it supports cost-effective storage management for immutable data that is rarely accessed, aligning with the data lake's lifecycle needs.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 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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