← DEA-C01·Amazon Web Services

Question 1,219 of 1,786

Data Ingestion and Transformation →hardMultiple ChoiceObjective-mapped

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 company is using Amazon Kinesis Data Firehose to deliver streaming data to an S3 bucket. The data includes a timestamp field. They want to partition the S3 objects by hour dynamically. The Firehose delivery stream is configured with a prefix like 'year=!{timestamp:yyyy}/month=!{timestamp:MM}/day=!{timestamp:dd}/hour=!{timestamp:HH}/'. However, the objects are not being partitioned as expected; all files end up in a single partition. What is the MOST likely cause?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
Dynamic partitioning is not enabled in the Firehose delivery stream configuration.
Without enabling dynamic partitioning, the prefix is static and all data goes into one S3 prefix.
B
The buffer size is set too large, delaying file delivery.
Why wrong: Buffer size affects how often files are written, not partitioning.
C
The timestamp is in UTC but the prefix uses local time.
Why wrong: Time zone mismatch would produce wrong hour, not a single partition.
D
The IAM role for Firehose lacks permissions to write to S3 with dynamic prefixes.
Why wrong: Lack of permissions would cause errors, not mispartitioning.

Full breakdown with real-world context →

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

✓

Dynamic partitioning is not enabled in the Firehose delivery stream configuration.

Option A is correct because Amazon Kinesis Data Firehose requires dynamic partitioning to be explicitly enabled in the delivery stream configuration in order to use custom partitioning keys and create partition prefixes dynamically. Without enabling dynamic partitioning, the timestamp expressions in the prefix are treated as static strings, resulting in a single partition. Option B is incorrect because buffer size affects delivery frequency, not partitioning behavior; even with large buffers, partitioning would still occur if dynamic partitioning were enabled. Option C is incorrect because time zone differences would cause incorrect hours, not a single partition; all files would still be distributed across hours. Option D is incorrect because IAM permission issues would cause write failures, not mispartitioning; the objects would simply not be delivered.

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.

✓
Dynamic partitioning is not enabled in the Firehose delivery stream configuration.
Why this is correct
Without enabling dynamic partitioning, the prefix is static and all data goes into one S3 prefix.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The buffer size is set too large, delaying file delivery.
Why it's wrong here
Buffer size affects how often files are written, not partitioning.
✗
The timestamp is in UTC but the prefix uses local time.
Why it's wrong here
Time zone mismatch would produce wrong hour, not a single partition.
✗
The IAM role for Firehose lacks permissions to write to S3 with dynamic prefixes.
Why it's wrong here
Lack of permissions would cause errors, not mispartitioning.

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.

Related DEA-C01 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Data Ingestion and Transformation practice questions

Practise DEA-C01 questions linked to Data Ingestion and Transformation.

Data Operations and Support practice questions

Practise DEA-C01 questions linked to Data Operations and Support.

Data Security and Governance practice questions

Practise DEA-C01 questions linked to Data Security and Governance.

Data Store Management practice questions

Practise DEA-C01 questions linked to Data Store Management.

DEA-C01 fundamentals practice questions

Practise DEA-C01 questions linked to DEA-C01 fundamentals.

DEA-C01 scenario practice questions

Practise DEA-C01 questions linked to DEA-C01 scenario.

DEA-C01 troubleshooting practice questions

Practise DEA-C01 questions linked to DEA-C01 troubleshooting.

Practice this exam

Start a free DEA-C01 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

DEA-C01 practice-test guide →Study guide →Browse all practice tests

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: Dynamic partitioning is not enabled in the Firehose delivery stream configuration. — Option A is correct because Amazon Kinesis Data Firehose requires dynamic partitioning to be explicitly enabled in the delivery stream configuration in order to use custom partitioning keys and create partition prefixes dynamically. Without enabling dynamic partitioning, the timestamp expressions in the prefix are treated as static strings, resulting in a single partition. Option B is incorrect because buffer size affects delivery frequency, not partitioning behavior; even with large buffers, partitioning would still occur if dynamic partitioning were enabled. Option C is incorrect because time zone differences would cause incorrect hours, not a single partition; all files would still be distributed across hours. Option D is incorrect because IAM permission issues would cause write failures, not mispartitioning; the objects would simply not be delivered.

What should I do if I get this DEA-C01 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

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 →

How Courseiva writes practice questions · Editorial policy

Keep practising

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.

Loading comments…

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.