This DVA-C02 practice question tests your understanding of development with aws services. 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 developer is implementing S3 multipart upload for large files. Which two actions are required to complete the upload?
Enable S3 static website hosting
Why wrong: This does not meet the stated requirement as directly as the correct option.
Upload all parts and keep their ETags/part numbers
Correct for the stated requirement.
Disable bucket encryption
Why wrong: This does not meet the stated requirement as directly as the correct option.
Call CompleteMultipartUpload with the uploaded part list
Correct for the stated requirement.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Upload all parts and keep their ETags/part numbers
Option B is correct because during an S3 multipart upload, each part must be uploaded individually, and the response includes an ETag (a hash of the part) and a part number. These must be recorded and provided in the final request to assemble the object. Option D is correct because the CompleteMultipartUpload API call is required to signal S3 to combine all uploaded parts into the final object, using the list of ETags and part numbers.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Enable S3 static website hosting
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Upload all parts and keep their ETags/part numbers
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Disable bucket encryption
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Call CompleteMultipartUpload with the uploaded part list
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates may think uploading all parts is sufficient without calling CompleteMultipartUpload, or they may confuse the multipart upload process with other S3 features like static hosting or encryption settings.
Detailed technical explanation
Under the hood, S3 multipart upload uses the UploadPart API for each part, which returns an ETag (MD5 hash of the part, or a composite hash if using SSE-C). The CompleteMultipartUpload request must include the part numbers and ETags in ascending order; S3 then concatenates the parts in that order to form the final object. A subtle behavior is that if you use SSE-KMS, the ETag is not a simple MD5, but you still must provide the ETag returned by S3.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
The correct answer is: Upload all parts and keep their ETags/part numbers — Option B is correct because during an S3 multipart upload, each part must be uploaded individually, and the response includes an ETag (a hash of the part) and a part number. These must be recorded and provided in the final request to assemble the object. Option D is correct because the CompleteMultipartUpload API call is required to signal S3 to combine all uploaded parts into the final object, using the list of ETags and part numbers.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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.
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