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Data Ingestion and Transformation →easyMultiple 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 needs to ingest data from an external API that returns CSV files daily. The files range from 100 MB to 2 GB. The data should be landed in Amazon S3 and then transformed using AWS Glue. Which ingestion method is most cost-effective and requires the least operational overhead?

Clue words in this question

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

Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

A
Set up AWS DataSync to transfer the file from the API endpoint to S3
Why wrong: DataSync is for transferring data from on-premises or other cloud storage, not for API calls.
B
Use Amazon Kinesis Data Firehose with a direct PUT
Why wrong: Designed for streaming, not for batch file downloads.
C
Deploy an AWS Direct Connect connection to the external API for faster transfer
Why wrong: Direct Connect is a network service, not a data ingestion method.
D
Schedule an AWS Lambda function to download the CSV file and upload it to Amazon S3
Simple, cost-effective, and serverless for daily files.

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

✓

Schedule an AWS Lambda function to download the CSV file and upload it to Amazon S3

Option D is correct because scheduling an AWS Lambda function to download the CSV file from the external API and upload it to Amazon S3 is the most cost-effective and operationally lightweight approach. Lambda can handle files up to 2 GB (with appropriate memory and timeout settings) and runs on a serverless, pay-per-execution model, eliminating the need for infrastructure management. This method directly addresses the daily, batch-oriented nature of the data ingestion without requiring additional services or complex configurations.

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.

✗
Set up AWS DataSync to transfer the file from the API endpoint to S3
Why it's wrong here
DataSync is for transferring data from on-premises or other cloud storage, not for API calls.
✗
Use Amazon Kinesis Data Firehose with a direct PUT
Why it's wrong here
Designed for streaming, not for batch file downloads.
✗
Deploy an AWS Direct Connect connection to the external API for faster transfer
Why it's wrong here
Direct Connect is a network service, not a data ingestion method.
✓
Schedule an AWS Lambda function to download the CSV file and upload it to Amazon S3
Why this is correct
Simple, cost-effective, and serverless for daily files.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often over-engineer the solution by choosing streaming or dedicated network services (like Kinesis Firehose or Direct Connect) for a simple batch ingestion task, failing to recognize that a serverless, scheduled Lambda function is the most cost-effective and low-overhead approach for daily CSV file transfers from an external API.

Detailed technical explanation

How to think about this question

AWS Lambda supports a maximum execution timeout of 15 minutes and a maximum memory of 10,240 MB, which is sufficient to download and upload a 2 GB CSV file if the network bandwidth and API response times are adequate. For files approaching the 2 GB limit, using Lambda with S3 multipart upload can improve reliability and reduce memory pressure. In real-world scenarios, you would also need to handle API authentication, retries for transient failures, and possibly use AWS Step Functions for orchestration if the download is time-sensitive or requires complex error handling.

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 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: Schedule an AWS Lambda function to download the CSV file and upload it to Amazon S3 — Option D is correct because scheduling an AWS Lambda function to download the CSV file from the external API and upload it to Amazon S3 is the most cost-effective and operationally lightweight approach. Lambda can handle files up to 2 GB (with appropriate memory and timeout settings) and runs on a serverless, pay-per-execution model, eliminating the need for infrastructure management. This method directly addresses the daily, batch-oriented nature of the data ingestion without requiring additional services or complex configurations.

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: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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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.