- A
Hot, because it is optimized for frequent reads and online access to active data.
Hot is the best fit for data that is accessed often and needs immediate online availability.
- B
Cool, because it is designed for infrequent access while still keeping blobs online.
Cool is appropriate for older files that are still online but read less often.
- C
Archive, because it is best for data that must be opened immediately by users.
Why wrong: Archive is offline storage and requires rehydration before the blob can be read again.
- D
Premium block blob, because it is the standard tier for long-term retention and low-cost storage.
Why wrong: Premium block blob is a performance-oriented option, not the usual choice for this access pattern.
- E
Cold, because it is intended for data that can stay offline until someone requests it.
Why wrong: Cold is still online storage, but this option suggests offline behavior, which does not match the requirement.
Hot and Cool Tiers for Online Blob Storage
This AZ-104 practice question tests your understanding of implement and manage storage. 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 records team stores blobs that are read often during the first month and then rarely accessed later, but the files must stay online the whole time. Which two access tiers should they use for the active and inactive data sets? Select two.
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.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Hot, because it is optimized for frequent reads and online access to active data.
Option A is correct because the Hot access tier is optimized for frequent reads and provides low-latency online access, making it ideal for the active data set that is read often during the first month. Option B is correct because the Cool access tier is designed for infrequently accessed data that must remain online, with lower storage costs but higher access costs, perfectly matching the rarely accessed but always online requirement.
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.
- ✓
Hot, because it is optimized for frequent reads and online access to active data.
Why this is correct
Hot is the best fit for data that is accessed often and needs immediate online availability.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Cool, because it is designed for infrequent access while still keeping blobs online.
Why this is correct
Cool is appropriate for older files that are still online but read less often.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Archive, because it is best for data that must be opened immediately by users.
Why it's wrong here
Archive is offline storage and requires rehydration before the blob can be read again.
When this WOULD be correct
A question that asks for the lowest-cost storage tier for data that is rarely accessed and can tolerate hours of retrieval time, such as long-term backup archives or compliance data that must be retained but not frequently read.
- ✗
Premium block blob, because it is the standard tier for long-term retention and low-cost storage.
Why it's wrong here
Premium block blob is a performance-oriented option, not the usual choice for this access pattern.
When this WOULD be correct
A question requiring low-latency storage for high-frequency transactions, such as a real-time analytics application that needs fast read/write access to block blobs, would make Premium block blob the correct choice.
- ✗
Cold, because it is intended for data that can stay offline until someone requests it.
Why it's wrong here
Cold is still online storage, but this option suggests offline behavior, which does not match the requirement.
When this WOULD be correct
A question where data is rarely accessed, can tolerate higher latency, and must be stored for at least 30 days, but does not require immediate online access. For example: 'A company archives old logs that are accessed less than once a year and can be retrieved with a delay of several hours.'
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓Hot, because it is optimized for frequent reads and online access to active data.Correct answer▾
Why this is correct
Hot is the best fit for data that is accessed often and needs immediate online availability.
✗Archive, because it is best for data that must be opened immediately by users.Wrong answer — click to see why▾
Why this is wrong here
The Archive tier is for data that is rarely accessed and has a retrieval latency of up to 15 hours; it is not for immediate access. The question requires blobs to stay online, but Archive tier data is offline until rehydrated.
★ When this WOULD be the correct answer
A question that asks for the lowest-cost storage tier for data that is rarely accessed and can tolerate hours of retrieval time, such as long-term backup archives or compliance data that must be retained but not frequently read.
Why candidates choose this
Candidates may confuse 'Archive' with a long-term retention tier and assume it can be accessed immediately, or they may think 'archive' implies online storage similar to a file archive.
✗Premium block blob, because it is the standard tier for long-term retention and low-cost storage.Wrong answer — click to see why▾
Why this is wrong here
Premium block blob accounts are designed for high transaction rates and low latency, not for long-term retention or low-cost storage. They are more expensive than standard tiers and are not optimized for infrequently accessed data.
★ When this WOULD be the correct answer
A question requiring low-latency storage for high-frequency transactions, such as a real-time analytics application that needs fast read/write access to block blobs, would make Premium block blob the correct choice.
Why candidates choose this
Candidates may confuse 'premium' with 'high durability' or assume it is a standard tier for all scenarios, overlooking its specific use case for high-performance workloads and higher cost.
✗Cold, because it is intended for data that can stay offline until someone requests it.Wrong answer — click to see why▾
Why this is wrong here
The Cold tier is designed for data that can be stored for up to 30 days with infrequent access, but it is not intended for data that must stay online; it has a higher latency and lower availability than Hot or Cool tiers. The question requires blobs to stay online, which Cold does not guarantee.
★ When this WOULD be the correct answer
A question where data is rarely accessed, can tolerate higher latency, and must be stored for at least 30 days, but does not require immediate online access. For example: 'A company archives old logs that are accessed less than once a year and can be retrieved with a delay of several hours.'
Why candidates choose this
Candidates may confuse 'Cold' with 'Cool' due to similar names, or assume that any tier with 'cold' in the name is suitable for infrequently accessed data that remains online, overlooking the specific latency and availability characteristics of the Cold tier.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the Cool tier with the Archive tier, assuming 'infrequent access' means offline, or they mistakenly think the Cold tier (which is offline) satisfies the 'online' requirement, but the question explicitly states files must stay online the whole time.
Detailed technical explanation
How to think about this question
Azure Blob Storage access tiers (Hot, Cool, Cold, Archive) have different storage and access cost profiles. The Hot tier charges higher storage costs but lower access costs, while the Cool tier offers lower storage costs but higher access costs (per GB read). The transition between tiers can be automated using lifecycle management policies (e.g., move blobs from Hot to Cool after 30 days). The Archive tier requires rehydration (up to 15 hours) before data can be read, making it unsuitable for online-only requirements.
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.
Quick reference
Azure Blob Storage Tier Comparison
| Tier | Storage Cost | Retrieval Cost | Latency | Use Case |
|---|---|---|---|---|
| Hot | Highest | Lowest | Immediate | Active data, frequent reads |
| Cool | Lower | Higher | Immediate | Data accessed < once / month |
| Cold | Lower still | Higher | Immediate | Data accessed < once / quarter |
| Archive | Lowest | Highest + rehydration delay | Hours | Long-term compliance retention |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Implement and Manage Storage — This question tests Implement and Manage Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Hot, because it is optimized for frequent reads and online access to active data. — Option A is correct because the Hot access tier is optimized for frequent reads and provides low-latency online access, making it ideal for the active data set that is read often during the first month. Option B is correct because the Cool access tier is designed for infrequently accessed data that must remain online, with lower storage costs but higher access costs, perfectly matching the rarely accessed but always online requirement.
What should I do if I get this AZ-104 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". 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.
About these practice questions
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Last reviewed: Jun 11, 2026
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