- A
Use Amazon Kinesis Data Firehose to directly load into Redshift.
Why wrong: Firehose delivers to Redshift via S3, but the question asks for methods; this is indirect but acceptable? However, Firehose can load directly into Redshift, but it's not as efficient as COPY for batch loads. I'll mark it wrong because the question asks for 'efficiently' and COPY is preferred.
- B
Use AWS DMS to replicate from S3 to Redshift.
Why wrong: DMS is for database migrations, not S3 to Redshift bulk loads.
- C
Use the Redshift COPY command to load from S3.
COPY is the fastest way to bulk load from S3.
- D
Use a staging table in S3 and then COPY into Redshift.
This is common: COPY from S3 to staging, then INSERT into target.
- E
Use individual INSERT statements in a loop.
Why wrong: INSERT is slow for large datasets.
Quick Answer
The answer is to use a staging table in S3 and then the COPY command into Redshift. This is the most efficient method because the COPY command leverages Redshift’s massively parallel processing (MPP) architecture to read JSON files directly from S3, automatically parsing the data and loading it in bulk, which avoids the slow, row-by-row overhead of INSERT statements. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of Redshift’s native ingestion patterns versus less optimal alternatives; a common trap is choosing Kinesis Data Firehose or DMS, which are designed for streaming or ongoing replication rather than efficient one-time batch loads. Remember the key principle: for bulk JSON loads from S3, always default to COPY—it’s purpose-built for speed and parallelism. A helpful memory tip is “COPY for bulk, INSERT for trickle”—if you see a JSON file in S3, think COPY first.
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. 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 ingestion pipeline to load JSON files from Amazon S3 into Amazon Redshift. Which TWO methods can be used to load the data efficiently?
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
Use the Redshift COPY command to load from S3.
Options A and C are correct. Using COPY from S3 is the most efficient method. Staging in S3 with COPY is also valid. Option B is wrong because INSERT is row-by-row and slow. Option D is wrong because Kinesis Data Firehose can deliver to Redshift but requires S3 as an intermediate. Option E is wrong because DMS is for ongoing replication, not one-time load.
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.
- ✗
Use Amazon Kinesis Data Firehose to directly load into Redshift.
Why it's wrong here
Firehose delivers to Redshift via S3, but the question asks for methods; this is indirect but acceptable? However, Firehose can load directly into Redshift, but it's not as efficient as COPY for batch loads. I'll mark it wrong because the question asks for 'efficiently' and COPY is preferred.
- ✗
Use AWS DMS to replicate from S3 to Redshift.
Why it's wrong here
DMS is for database migrations, not S3 to Redshift bulk loads.
- ✓
Use the Redshift COPY command to load from S3.
Why this is correct
COPY is the fastest way to bulk load from S3.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use a staging table in S3 and then COPY into Redshift.
Why this is correct
This is common: COPY from S3 to staging, then INSERT into target.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use individual INSERT statements in a loop.
Why it's wrong here
INSERT is slow for large datasets.
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.
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: Use the Redshift COPY command to load from S3. — Options A and C are correct. Using COPY from S3 is the most efficient method. Staging in S3 with COPY is also valid. Option B is wrong because INSERT is row-by-row and slow. Option D is wrong because Kinesis Data Firehose can deliver to Redshift but requires S3 as an intermediate. Option E is wrong because DMS is for ongoing replication, not one-time load.
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.
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Last reviewed: Jun 20, 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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