- A
Enable dynamic partitioning
Dynamic partitioning allows Firehose to partition data based on keys.
- B
Set a custom prefix with '!{timestamp:yyyy}/!{timestamp:MM}/!{timestamp:dd}/!{timestamp:HH}/'
Custom prefix allows dynamic directory structure based on timestamps.
- C
Use an AWS Lambda function to write to S3 with the desired prefix
Why wrong: Lambda transformation is not needed; Firehose can set prefixes directly.
- D
Enable format conversion to Parquet
Why wrong: Format conversion does not affect directory structure.
- E
Configure an S3 bucket with versioning enabled
Why wrong: Versioning is for object version control, not directory structure.
Question 1,051 of 1,786
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 ingestion pipeline that uses Amazon Kinesis Data Firehose to deliver data to Amazon S3. The engineer wants to ensure that the data is organized in a directory structure by year, month, day, and hour. Which TWO configurations should the engineer set on the Firehose delivery stream? (Choose TWO.)
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
✓
Enable dynamic partitioning
Correct options: A and B. Option A is correct because enabling dynamic partitioning allows Firehose to use partition keys from the data, such as timestamps, to automatically create folder structures in S3. Option B is correct because setting a custom prefix with the expression '!{timestamp:yyyy}/!{timestamp:MM}/!{timestamp:dd}/!{timestamp:HH}/' defines the directory hierarchy by year, month, day, and hour. Option C is incorrect because using a Lambda function to write to S3 with a desired prefix is not necessary; Firehose handles the prefix natively. Option D is incorrect because format conversion to Parquet is unrelated to directory organization. Option E is incorrect because S3 bucket versioning does not affect directory structure.
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.
- ✓
Enable dynamic partitioning
Why this is correct
Dynamic partitioning allows Firehose to partition data based on keys.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Set a custom prefix with '!{timestamp:yyyy}/!{timestamp:MM}/!{timestamp:dd}/!{timestamp:HH}/'
Why this is correct
Custom prefix allows dynamic directory structure based on timestamps.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use an AWS Lambda function to write to S3 with the desired prefix
Why it's wrong here
Lambda transformation is not needed; Firehose can set prefixes directly.
- ✗
Enable format conversion to Parquet
Why it's wrong here
Format conversion does not affect directory structure.
- ✗
Configure an S3 bucket with versioning enabled
Why it's wrong here
Versioning is for object version control, not directory structure.
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 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.
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 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.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable dynamic partitioning — Correct options: A and B. Option A is correct because enabling dynamic partitioning allows Firehose to use partition keys from the data, such as timestamps, to automatically create folder structures in S3. Option B is correct because setting a custom prefix with the expression '!{timestamp:yyyy}/!{timestamp:MM}/!{timestamp:dd}/!{timestamp:HH}/' defines the directory hierarchy by year, month, day, and hour. Option C is incorrect because using a Lambda function to write to S3 with a desired prefix is not necessary; Firehose handles the prefix natively. Option D is incorrect because format conversion to Parquet is unrelated to directory organization. Option E is incorrect because S3 bucket versioning does not affect directory structure.
What should I do if I get this DEA-C01 question wrong?
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.
What is the key concept behind this question?
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 →
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Last reviewed: Jun 20, 2026
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