The answer is to enable Azure CDN or Azure Front Door to cache the static content. This is correct because these services act as a content delivery network, storing copies of your BlockBlobs at edge locations closer to users, which intercepts repeated requests before they reach the storage account. By caching the static assets, you directly reduce the number of GetBlob operations logged in your diagnostic data, lowering both latency and storage transaction costs. On the AZ-305 exam, this scenario tests your understanding of optimizing storage performance and cost through caching patterns, often appearing as a trap where candidates mistakenly suggest scaling the storage account or changing the blob tier instead. A common memory tip is to think of CDN as a “shield” for your storage—every cached hit is a GetBlob you don’t pay for. Remember: static content plus high read volume equals CDN or Front Door.
AZ-305 Design data storage solutions Practice Question
This AZ-305 practice question tests your understanding of design data storage 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.
Exhibit
{
"query": "AzureDiagnostics | where ResourceProvider == \"MICROSOFT.STORAGE\" | where OperationName == \"GetBlob\" | summarize Count = count() by BlobType, bin(TimeGenerated, 1h) | order by TimeGenerated desc",
"result": [
{"BlobType": "BlockBlob", "Count": 1200, "TimeGenerated": "2026-03-15T10:00:00Z"},
{"BlobType": "PageBlob", "Count": 50, "TimeGenerated": "2026-03-15T10:00:00Z"},
{"BlobType": "AppendBlob", "Count": 200, "TimeGenerated": "2026-03-15T10:00:00Z"}
]
}
Refer to the exhibit. A company is analyzing Azure Storage diagnostic logs using this KQL query. They notice a high number of GetBlob operations on BlockBlobs. The storage account is used for a web application that serves static content. What should they recommend to reduce the number of GetBlob operations?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Azure CDN or Azure Front Door to cache content.
Option C is correct because enabling Azure CDN or Azure Front Door caches static content at edge locations, reducing the number of direct GetBlob operations against the storage account. This offloads repeated requests from the origin storage, lowering both operational costs and latency for the web application.
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.
✗
Implement Azure Blob Storage life cycle management to move data to the archive tier.
Why it's wrong here
Does not reduce read operations.
✗
Use Azure File Sync to cache files on-premises.
Why it's wrong here
Not applicable to blob storage.
✓
Enable Azure CDN or Azure Front Door to cache content.
Why this is correct
Reduces direct blob requests by serving cached content.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Azure Storage Analytics logging to track operations.
Why it's wrong here
Logging does not reduce operations.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse logging (Option D) or lifecycle management (Option A) as solutions to reduce operations, when they only provide monitoring or cost optimization for infrequently accessed data, not a reduction in read requests.
Detailed technical explanation
How to think about this question
Azure CDN and Front Door use a pull-through caching model where the first request fetches the blob from the storage account and caches it at the edge, subsequent requests serve from cache until the TTL expires. This reduces the number of GetBlob operations to the storage account by orders of magnitude, and also improves client latency by serving content from a nearby point of presence (POP).
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Azure CDN or Azure Front Door to cache content. — Option C is correct because enabling Azure CDN or Azure Front Door caches static content at edge locations, reducing the number of direct GetBlob operations against the storage account. This offloads repeated requests from the origin storage, lowering both operational costs and latency for the web application.
What should I do if I get this AZ-305 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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