AZ-104 Implement and Manage Storage Practice Question
A legal department keeps evidence files in Azure Blob Storage. The files are accessed only a few times per year, but they must stay online and be immediately readable when requested. The team wants the lowest-cost online tier and does not want a rehydration step. Which tier should you choose?
⚠ Common exam trap
Watch out — candidates often confuse 'lowest cost' with the Archive tier, forgetting that Archive is offline and requires a rehydration step, which violates the requirement for immediate readability without a rehydration step.
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, because it keeps data online and is intended for rarely accessed content.
The Cold tier is the correct choice because it is an online tier designed for rarely accessed data that must remain immediately readable without a rehydration step. It offers lower storage costs than Hot or Cool while still providing instant access, meeting the requirement for the lowest-cost online tier.
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 prioritizes immediate access over storage cost.
Why it's wrong here
The Hot tier is optimized for workloads with high read/write frequency and delivers the lowest access latency, but it charges the highest storage price per gigabyte among the online tiers. Since the evidence is accessed only a few times per year, Hot would keep the data online but at an unnecessarily high storage cost, failing the cost-efficiency requirement. Cold provides the same online accessibility with significantly lower storage prices for rarely accessed data, making Hot a poor financial fit here.
When this WOULD be correct
If the question specified that the data is accessed frequently (e.g., multiple times per day) and requires the lowest latency, Hot tier would be correct despite higher cost.
- ✗
Cool, because it is an online tier for infrequent access.
Why it's wrong here
The Cool tier is indeed an online tier for infrequently accessed data, but it is generally intended for data accessed about once a month and has a minimum 30-day retention requirement that can incur early-deletion penalties. Evidence files accessed only a few times per year are rarer than Cool's target usage, so Cool's per-gigabyte storage cost is higher than Cold's without offering any availability advantage. While Cool is not wrong about being online, it is a middle ground that under-optimizes cost for this specific access pattern.
When this WOULD be correct
A company stores backup files that are accessed monthly and must be immediately available. They want to minimize cost while keeping data online. Cool tier would be correct because it balances cost and access frequency for data accessed every 30 days.
- ✓
Cold, because it keeps data online and is intended for rarely accessed content.
Why this is correct
Cold is the right tier because the files must remain immediately readable and cannot be placed into an offline state. The scenario says the data is accessed only a few times per year, so a lower-cost online tier is appropriate. Archive would introduce rehydration delay, which the business explicitly does not want. Cold preserves online availability while reducing storage cost compared with hotter tiers.
- ✗
Archive, because it has the lowest cost and can be opened instantly from the portal.
Why it's wrong here
Archive is Azure's lowest-cost storage tier, but it is explicitly offline: stored blobs must be rehydrated to an online tier (e.g., Hot, Cool, or Cold) before any read can return data, and rehydration can take minutes to hours depending on priority. The claim that files 'can be opened instantly from the portal' is false—the portal only triggers an asynchronous rehydration operation, and the file remains unreadable until that completes. Because the legal department requires evidence files to remain immediately readable, Archive violates the core business constraint even though it maximizes storage cost savings.
When this WOULD be correct
If the question specified that data can tolerate a rehydration delay of several hours and the lowest storage cost is the only priority, Archive would be correct. For example: 'A team needs to store backup tapes for regulatory compliance, accessed once a year, and can wait up to 24 hours for retrieval.'
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.
✓Cold, because it keeps data online and is intended for rarely accessed content.Correct answer▾
Why this is correct
Cold is the right tier because the files must remain immediately readable and cannot be placed into an offline state. The scenario says the data is accessed only a few times per year, so a lower-cost online tier is appropriate. Archive would introduce rehydration delay, which the business explicitly does not want. Cold preserves online availability while reducing storage cost compared with hotter tiers.
✗Hot, because it prioritizes immediate access over storage cost.Wrong answer — click to see why▾
Why this is wrong here
Hot tier is designed for frequently accessed data and has the highest storage cost, which contradicts the requirement for the lowest-cost online tier for rarely accessed files.
★ When this WOULD be the correct answer
If the question specified that the data is accessed frequently (e.g., multiple times per day) and requires the lowest latency, Hot tier would be correct despite higher cost.
Why candidates choose this
Candidates may assume that 'immediate access' always requires Hot tier, overlooking that Cold tier also provides immediate online access at lower cost for infrequent access.
✗Cool, because it is an online tier for infrequent access.Wrong answer — click to see why▾
Why this is wrong here
Cool tier requires a minimum of 30 days storage and has a higher per-GB cost than Cold, but the question specifies 'lowest-cost online tier' and 'immediately readable' — Cool is not the cheapest online tier for rarely accessed data.
★ When this WOULD be the correct answer
A company stores backup files that are accessed monthly and must be immediately available. They want to minimize cost while keeping data online. Cool tier would be correct because it balances cost and access frequency for data accessed every 30 days.
Why candidates choose this
Candidates see 'infrequent access' and assume Cool is the best fit, but they overlook that Cold is also online and cheaper for data accessed only a few times per year.
✗Archive, because it has the lowest cost and can be opened instantly from the portal.Wrong answer — click to see why▾
Why this is wrong here
Archive tier requires a rehydration step (which can take hours) to make data readable, contradicting the requirement for immediate readability without a rehydration step.
★ When this WOULD be the correct answer
If the question specified that data can tolerate a rehydration delay of several hours and the lowest storage cost is the only priority, Archive would be correct. For example: 'A team needs to store backup tapes for regulatory compliance, accessed once a year, and can wait up to 24 hours for retrieval.'
Why candidates choose this
Candidates see 'lowest cost' and assume Archive is always the best choice for rarely accessed data, overlooking the rehydration requirement and the need for immediate online access.
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
Managed Identities for Azure Resources
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.
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.
About these practice questions
Courseiva writes every AZ-104 question from scratch — 1,049 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on AZ-104
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. You store long-term financial statements in Azure Blob Storage. The files are almost never accessed, but when they are needed they must be readable immediately without waiting for rehydration. You need to minimize cost. Which access tier should you use?
hard- A.Hot
- ✓ B.Cool
- C.Archive
- D.Premium
Why B: The Cool access tier is optimal for data that is infrequently accessed but must be available immediately when needed, offering lower storage costs than Hot while maintaining low-latency read access. Archive would require rehydration (taking hours) before reading, violating the requirement for immediate readability. Hot is more expensive for long-term storage of rarely accessed data, and Premium is designed for high-performance workloads, not cost-efficient archival.
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.