The answer is Azure Blob Storage with Azure CDN and Azure Files for resumable uploads using AzCopy. This combination is correct because Azure Blob Storage offers cost-effective, scalable storage for large video files up to 50 GB, while Azure CDN caches content at edge nodes for low-latency global delivery. Azure Files provides a managed file share that supports resumable uploads via AzCopy, which can pause and resume transfers even for massive files, ensuring reliability over unstable networks. On the AZ-305 exam, this scenario tests your ability to integrate storage, content delivery, and data transfer tools for media workloads—a common design pattern for global streaming platforms. A frequent trap is choosing Azure Files alone, which lacks CDN integration, or Azure NetApp Files, which is overkill and expensive for simple video serving. Remember the mnemonic: “Blob for bulk, CDN for speed, Files for failsafe uploads.”
AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. 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 are designing a storage solution for a media company that needs to store large video files (up to 50 GB each) and serve them to a global audience with low latency. The solution must be cost-effective and support resumable uploads. Which Azure storage solution should you recommend?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Blob Storage with Azure CDN and Azure Files for resumable uploads using AzCopy.
Option B is correct because Azure Blob Storage with CDN and Azure Files with AzCopy provides cost-effective storage for large files, CDN for low latency global delivery, and resumable uploads via AzCopy. Option A is wrong because Azure Files alone does not provide global CDN. Option C is wrong because Azure NetApp Files is enterprise-grade and expensive. Option D is wrong because Azure Disk Storage is for VM disks, not for serving files.
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.
✗
Azure Files with Azure File Sync and Azure CDN.
Why it's wrong here
Azure File Sync is for caching, not global distribution; CDN is not native for Azure Files.
✗
Azure Disk Storage with Azure Load Balancer.
Why it's wrong here
Disk storage is for VM disks, not for file serving.
✓
Azure Blob Storage with Azure CDN and Azure Files for resumable uploads using AzCopy.
Why this is correct
Blob Storage is cost-effective for large files; CDN provides low latency; AzCopy supports resumable uploads.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure NetApp Files with Azure Front Door.
Why it's wrong here
NetApp Files is expensive and not designed for serving files via CDN.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
Identify which AZ-305 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.
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Blob Storage with Azure CDN and Azure Files for resumable uploads using AzCopy. — Option B is correct because Azure Blob Storage with CDN and Azure Files with AzCopy provides cost-effective storage for large files, CDN for low latency global delivery, and resumable uploads via AzCopy. Option A is wrong because Azure Files alone does not provide global CDN. Option C is wrong because Azure NetApp Files is enterprise-grade and expensive. Option D is wrong because Azure Disk Storage is for VM disks, not for serving files.
What should I do if I get this AZ-305 question wrong?
Identify which AZ-305 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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Question Discussion
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