The answer is Hot, Cool, and Cold. These three Azure Storage access tiers allow direct reading because they are designed for online, immediate access, meaning data is stored on high-throughput, low-latency media and is always available without any rehydration delay. In contrast, the Archive tier requires a manual rehydration process that can take hours, making it unsuitable for scenarios where blobs must be read immediately after upload. On the AZ-104 exam, this concept tests your understanding of the trade-off between cost and access latency, often appearing in scenario-based questions where a data-processing app reads blobs right after upload. A common trap is assuming Cold tier requires rehydration, but it does not—only Archive does. For a quick memory tip, remember the three "online" tiers: Hot, Cool, and Cold—all start with letters from the first half of the alphabet, while Archive is the only one that starts with a vowel, signaling it is "offline" and needs extra steps to read.
AZ-104 Implement and Manage Storage Practice Question
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 data-processing app reads blobs immediately after upload, and operations do not want any rehydration delay. Which three access tiers can be read directly? Select three.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Hot
The Hot, Cool, and Cold access tiers are designed for online data access, meaning blobs stored in these tiers can be read immediately without any rehydration delay. This is because the data is always stored on high-throughput, low-latency media and is immediately available for read operations. In contrast, the Archive tier requires a rehydration process (which can take hours) before data can be accessed, making it unsuitable for scenarios where blobs must be read immediately after upload.
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
Why this is correct
Correct. Hot blobs remain online and can be read immediately without a restore operation.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Cool
Why this is correct
Correct. Cool blobs are also online, so applications can read them without rehydration.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Cold
Why this is correct
Correct. Cold is an online access tier, so the blob remains readable directly.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Archive
Why it's wrong here
Incorrect. Archive is offline storage and requires rehydration before normal blob access works.
✗
Premium
Why it's wrong here
Incorrect. Premium describes a performance-oriented storage offering, not a blob access tier.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the Cold tier with the Archive tier, assuming Cold also requires rehydration, or they mistakenly think the Premium tier is an access tier like Hot/Cool/Cold, when in fact it is a performance tier for premium block blob accounts and not a blob-level access tier.
Detailed technical explanation
How to think about this question
Under the hood, Azure Blob Storage uses a tiered storage architecture where Hot, Cool, and Cold tiers store data on SSD or HDD-based clusters with always-on connectivity, while Archive tier data is stored on tape or high-density offline media. The rehydration process for Archive involves copying the blob to an online tier, which can take from 1 to 15 hours depending on the priority (high or standard). A real-world scenario where this matters is a video processing pipeline that ingests raw footage and immediately starts transcoding; using Archive would break the pipeline due to rehydration latency, whereas Cold tier offers a cost-effective balance with instant access.
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-104 question in full detail.
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 — The Hot, Cool, and Cold access tiers are designed for online data access, meaning blobs stored in these tiers can be read immediately without any rehydration delay. This is because the data is always stored on high-throughput, low-latency media and is immediately available for read operations. In contrast, the Archive tier requires a rehydration process (which can take hours) before data can be accessed, making it unsuitable for scenarios where blobs must be read immediately after upload.
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: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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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