AZ-204 Develop for Azure storage Practice Question
This AZ-204 practice question tests your understanding of develop for azure storage. 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.
You need to upload large files (up to 100 GB) to Azure Blob Storage from a web application. The upload must be resilient to network failures and support pausing/resuming. Which approach should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use block blob with multiple blocks and parallel upload.
Option B is correct because block blobs support uploading large files (up to ~4.75 TB) by splitting the file into multiple blocks, uploading them in parallel for speed, and committing the block list atomically. This approach provides resilience to network failures (individual blocks can be retried) and supports pausing/resuming by tracking which blocks have been uploaded.
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.
✗
Upload the blob as a single PUT operation.
Why it's wrong here
Incorrect. Single PUT for 100 GB is not supported (max 5 GB) and not resumable.
✓
Use block blob with multiple blocks and parallel upload.
Why this is correct
Correct. Block blobs support chunked upload with retry and resume capability.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use append blob.
Why it's wrong here
Incorrect. Append blobs are for append-only scenarios, not large uploads with resume.
✗
Use AzCopy from the server.
Why it's wrong here
Incorrect. AzCopy is a command-line tool, not suitable for in-browser web application uploads.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse append blobs with block blobs, thinking append blobs support arbitrary uploads, but append blobs only allow data to be added to the end and cannot be used for random-access or parallel uploads.
Trap categories for this question
Command / output trap
Incorrect. AzCopy is a command-line tool, not suitable for in-browser web application uploads.
Scenario analysis trap
Incorrect. Append blobs are for append-only scenarios, not large uploads with resume.
Detailed technical explanation
How to think about this question
Under the hood, block blobs use the Put Block REST API to upload each block (up to 100 MB each) and then the Put Block List API to commit them. The client can track uploaded block IDs (e.g., using base64-encoded block IDs) to resume from the last successful block after a failure. In real-world scenarios, this pattern is essential for uploads over unreliable networks, such as mobile apps uploading videos to Azure.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use block blob with multiple blocks and parallel upload. — Option B is correct because block blobs support uploading large files (up to ~4.75 TB) by splitting the file into multiple blocks, uploading them in parallel for speed, and committing the block list atomically. This approach provides resilience to network failures (individual blocks can be retried) and supports pausing/resuming by tracking which blocks have been uploaded.
What should I do if I get this AZ-204 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.
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Question Discussion
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