← DVA-C02·Amazon Web Services

Question 1,485 of 1,616

Development with AWS Services →mediumMultiple ChoiceObjective-mapped

DVA-C02 Development with AWS Services Practice Question

This DVA-C02 practice question tests your understanding of development with aws services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 wants to build a RESTful API that handles file uploads. The API needs to support multipart/form-data content type. The developer is using Amazon API Gateway and AWS Lambda. Which approach should the developer use to handle file uploads efficiently?

Question 1mediummultiple choice

Full question →

A
Configure API Gateway to pass the entire request body to Lambda, and process the file within the Lambda function.
Why wrong: Lambda has a maximum invocation payload limit of 6 MB (for synchronous) and API Gateway has a 10 MB limit, making this approach unsuitable for large files.
B
Create a Lambda function that accepts the file and uploads it to S3 using the AWS SDK.
Why wrong: Same limitation: Lambda payload size limit will restrict file sizes.
C
Use API Gateway to generate a presigned S3 URL, and have the client upload directly to S3. The Lambda function can then process the file asynchronously.
This approach uses presigned URLs to allow direct upload to S3, avoiding API Gateway and Lambda payload limits. The Lambda function can be triggered by S3 events to process the uploaded file.
D
Use an EC2 instance to host a custom web server that accepts file uploads and writes to S3.
Why wrong: This is a valid solution but not serverless and is more complex to manage. The question implies using serverless services.

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

✓

Use API Gateway to generate a presigned S3 URL, and have the client upload directly to S3. The Lambda function can then process the file asynchronously.

Option C is correct because it offloads the file upload to Amazon S3 directly via a presigned URL, which avoids the 10 MB payload limit and 29-second timeout of API Gateway and Lambda for large files. The client uploads the file to S3, and a separate Lambda function processes the file asynchronously, making the solution efficient and scalable for multipart/form-data uploads.

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.

✗
Configure API Gateway to pass the entire request body to Lambda, and process the file within the Lambda function.
Why it's wrong here
Lambda has a maximum invocation payload limit of 6 MB (for synchronous) and API Gateway has a 10 MB limit, making this approach unsuitable for large files.
✗
Create a Lambda function that accepts the file and uploads it to S3 using the AWS SDK.
Why it's wrong here
Same limitation: Lambda payload size limit will restrict file sizes.
✓
Use API Gateway to generate a presigned S3 URL, and have the client upload directly to S3. The Lambda function can then process the file asynchronously.
Why this is correct
This approach uses presigned URLs to allow direct upload to S3, avoiding API Gateway and Lambda payload limits. The Lambda function can be triggered by S3 events to process the uploaded file.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use an EC2 instance to host a custom web server that accepts file uploads and writes to S3.
Why it's wrong here
This is a valid solution but not serverless and is more complex to manage. The question implies using serverless services.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates assume Lambda can handle file uploads directly via API Gateway, overlooking the 10 MB payload limit and 29-second timeout, and fail to recognize the presigned URL pattern as the efficient serverless solution for large multipart/form-data uploads.

Detailed technical explanation

How to think about this question

Presigned S3 URLs are generated by a Lambda function (or API Gateway) using the AWS SDK's `generate_presigned_url` method, which creates a time-limited URL with specific HTTP method (PUT) and content-type constraints. The client then uploads the file directly to S3 using that URL, bypassing API Gateway and Lambda entirely for the data transfer. This pattern is essential for handling large files (e.g., >10 MB) or high-throughput uploads, as S3 can accept files up to 5 TB and supports multipart upload for large files.

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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Related DVA-C02 practice-question pages

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

Development with AWS Services practice questions

Practise DVA-C02 questions linked to Development with AWS Services.

Security practice questions

Practise DVA-C02 questions linked to Security.

Deployment practice questions

Practise DVA-C02 questions linked to Deployment.

Troubleshooting and Optimization practice questions

Practise DVA-C02 questions linked to Troubleshooting and Optimization.

DVA-C02 fundamentals practice questions

Practise DVA-C02 questions linked to DVA-C02 fundamentals.

DVA-C02 scenario practice questions

Practise DVA-C02 questions linked to DVA-C02 scenario.

DVA-C02 troubleshooting practice questions

Practise DVA-C02 questions linked to DVA-C02 troubleshooting.

Practice this exam

Start a free DVA-C02 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

DVA-C02 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this DVA-C02 question test?

Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Use API Gateway to generate a presigned S3 URL, and have the client upload directly to S3. The Lambda function can then process the file asynchronously. — Option C is correct because it offloads the file upload to Amazon S3 directly via a presigned URL, which avoids the 10 MB payload limit and 29-second timeout of API Gateway and Lambda for large files. The client uploads the file to S3, and a separate Lambda function processes the file asynchronously, making the solution efficient and scalable for multipart/form-data uploads.

What should I do if I get this DVA-C02 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.

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 DVA-C02 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 DVA-C02 exam.