The answer is Azure Blob Storage Hot tier for the first 30 days. This is correct because the Hot tier is specifically designed for frequently accessed data, providing low-latency access (typically under 10 milliseconds for first-byte read) while balancing cost—it has the highest storage cost but the lowest access cost, making it ideal for the initial high-demand period. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your ability to differentiate between access tiers based on lifecycle patterns; a common trap is choosing Premium Blob Storage for its sub-millisecond latency, but that is overkill for standard streaming workloads and would unnecessarily increase costs. Remember that Hot tier is your go-to for frequent access with standard latency needs, while Premium is reserved for high IOPS or transactional workloads. Memory tip: think “Hot for the hot month” — use Hot tier when data is actively accessed, then cool it down later.
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.
A company needs to store video files for a media streaming application. The files are accessed frequently for the first 30 days, then rarely after that. The solution must minimize storage costs while ensuring low-latency access during the initial period. Which storage tier should be used for the first 30 days?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 Hot tier
Azure Blob Storage Hot tier is designed for data that is accessed frequently, offering low-latency access (typically under 10 milliseconds for first-byte read) and the highest storage cost but lowest access cost. Since the video files require low-latency access during the first 30 days, the Hot tier meets the performance requirement while minimizing overall cost compared to Premium Blob Storage, which is optimized for sub-millisecond latency and higher IOPS scenarios.
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 Blob Storage Hot tier
Why this is correct
Hot tier is optimized for frequent access with low latency, suitable for first 30 days.
Clue confirmation
The clue words "first", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Blob Storage Cool tier
Why it's wrong here
Cool tier is for infrequent access with higher access costs, not optimal for frequent access.
✗
Azure Premium Blob Storage
Why it's wrong here
Premium Blob Storage is for high-performance block storage, not cost-effective for video files.
✗
Azure Blob Storage Archive tier
Why it's wrong here
Archive tier has high retrieval latency, unsuitable for frequent low-latency access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose the Cool tier thinking it balances cost and access, but they overlook that Cool tier has higher access costs and a 30-day early deletion penalty, making it more expensive than Hot for frequent access during the first 30 days.
Detailed technical explanation
How to think about this question
Azure Blob Storage access tiers (Hot, Cool, Cold, Archive) are managed at the blob level and use a graduated pricing model where storage cost decreases as access cost increases. The Hot tier charges approximately $0.018/GB/month for storage (LRS) versus $0.01/GB/month for Cool, but Cool charges $0.01/GB for read operations versus $0.0004/GB for Hot, making Cool more expensive for frequent reads. A real-world scenario is a video-on-demand service where new content is streamed heavily for the first month, then archived; using lifecycle management policies to automatically transition blobs from Hot to Cool or Archive after 30 days optimizes cost without manual intervention.
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: Azure Blob Storage Hot tier — Azure Blob Storage Hot tier is designed for data that is accessed frequently, offering low-latency access (typically under 10 milliseconds for first-byte read) and the highest storage cost but lowest access cost. Since the video files require low-latency access during the first 30 days, the Hot tier meets the performance requirement while minimizing overall cost compared to Premium Blob Storage, which is optimized for sub-millisecond latency and higher IOPS scenarios.
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.
Are there clue words in this question I should notice?
Yes — watch for: "first", "minimum / minimize". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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