AZ-104 Implement and Manage Storage Practice Question
A compliance team keeps signed contract scans in blob storage. The files are usually not accessed, but when they are needed they must be available immediately without waiting for rehydration. The team wants the lowest-cost online tier that still allows immediate reads. Which access tier should you choose?
⚠ Common exam trap
A common mix-up: candidates choose Cool or Hot because they assume 'lowest cost' means Archive, forgetting that Archive is offline and requires rehydration, or they overlook the Cold tier as a newer, lower-cost online option.
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
✓
Cold
The Cold tier (C) is correct because it is the lowest-cost online access tier that provides immediate read access without requiring rehydration. Unlike the Archive tier, Cold tier data is always online and can be read instantly, while still offering lower storage costs than Cool or Hot tiers for data that is rarely accessed.
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 it's wrong here
Hot is wrong because it is optimized for frequent, high-volume read and write operations and carries the highest storage price among the online tiers. Signed contract scans are infrequently accessed after they are stored, so paying Hot-tier rates for long-term retention would waste budget. Although Hot provides immediate access, the compliance team does not need that performance level for data that sits untouched most of the time.
When this WOULD be correct
A scenario where the compliance team needs the lowest latency for frequent reads and cost is not the primary concern, such as for active contract negotiations requiring instant access multiple times per day.
- ✗
Cool
Why it's wrong here
Cool is wrong because, while it is designed for infrequent access, its storage cost is generally higher than Cold for long-term online retention. Cool also has a 30-day minimum billable duration and higher per-GB storage charges than Cold, making it less economical for data retained for months or years. For truly infrequent access where immediate readability is still required, Cold is the more cost-effective online tier.
When this WOULD be correct
If the question asked for the lowest-cost tier for data that is accessed moderately frequently (e.g., monthly) and requires immediate availability, Cool tier would be correct. For example: 'You need to store monthly reports that are accessed several times a month and must be available instantly. Choose the most cost-effective online tier.'
- ✓
Cold
Why this is correct
Cold is the correct choice because it is an online access tier designed specifically for infrequently accessed data that must remain immediately readable. It offers substantially lower storage costs than Hot or Cool while still allowing direct access without a rehydration step. For a compliance team retaining signed contract scans that are rarely retrieved but may be needed on demand, Cold balances long-term storage economy with instant availability.
- ✗
Archive
Why it's wrong here
Archive is wrong because although it has the lowest storage cost of any tier, its data is offline and requires an explicit rehydration operation before it can be read. This rehydration can take hours, making the contracts unavailable for immediate compliance or audit requests. Since the scenario requires the scans to remain immediately readable, Archive’s cost advantage is outweighed by its unacceptable retrieval latency.
When this WOULD be correct
For long-term backup or compliance data that is rarely accessed and can tolerate hours of retrieval delay, where lowest storage cost is the priority and immediate access is not required.
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.
✓ColdCorrect answer▾
Why this is correct
Cold is the correct choice because it is an online access tier designed specifically for infrequently accessed data that must remain immediately readable. It offers substantially lower storage costs than Hot or Cool while still allowing direct access without a rehydration step. For a compliance team retaining signed contract scans that are rarely retrieved but may be needed on demand, Cold balances long-term storage economy with instant availability.
✗HotWrong answer — click to see why▾
Why this is wrong here
Hot tier is the highest-cost online tier, not the lowest-cost. The question asks for the lowest-cost online tier that still allows immediate reads, which is Cold, not Hot.
★ When this WOULD be the correct answer
A scenario where the compliance team needs the lowest latency for frequent reads and cost is not the primary concern, such as for active contract negotiations requiring instant access multiple times per day.
Why candidates choose this
Candidates may assume 'Hot' is always the best for immediate access without considering cost, or they may not know that Cold tier also provides immediate reads at lower cost.
✗CoolWrong answer — click to see why▾
Why this is wrong here
Cool tier has higher storage cost than Cold tier and is not the lowest-cost online tier for infrequently accessed data. The question specifically asks for the lowest-cost online tier that allows immediate reads, and Cold tier meets that requirement at a lower storage cost than Cool.
★ When this WOULD be the correct answer
If the question asked for the lowest-cost tier for data that is accessed moderately frequently (e.g., monthly) and requires immediate availability, Cool tier would be correct. For example: 'You need to store monthly reports that are accessed several times a month and must be available instantly. Choose the most cost-effective online tier.'
Why candidates choose this
Candidates may assume Cool is the lowest-cost online tier because it is commonly used for infrequently accessed data, but they overlook that Cold tier is even cheaper for data that is rarely accessed but still needs to be online.
✗ArchiveWrong answer — click to see why▾
Why this is wrong here
Archive tier requires rehydration (which can take hours) before data can be read, violating the requirement for immediate availability without waiting.
★ When this WOULD be the correct answer
For long-term backup or compliance data that is rarely accessed and can tolerate hours of retrieval delay, where lowest storage cost is the priority and immediate access is not required.
Why candidates choose this
Candidates may think Archive is the cheapest option and assume 'rarely accessed' justifies it, overlooking the critical requirement for immediate reads without rehydration.
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?”
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 |
Go deeper
Related to this question
Learn chapter
Customer-Managed Keys (CMK) for Storage Encryption
Key term
Blob
A blob is a large piece of unstructured data, like a photo or video, stored in the cloud with a unique identifier.
Key term
Blob storage
Blob storage is a cloud service for storing large amounts of unstructured data, such as text or binary data, like documents, images, and videos.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-104 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-104 exam.