AZ-104 Implement and Manage Storage Practice Question
A legal department stores project video assets in Azure Blob Storage. The files are reviewed only during quarterly audits, but when someone needs a file it must open immediately without waiting for rehydration. Which access tier should the administrator use for the blobs?
⚠ Common exam trap
A common mix-up: candidates choose Archive thinking it is the cheapest for rarely used data, forgetting that Archive blobs are offline and require significant rehydration time, which contradicts the 'immediately available' requirement in the question.
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
✓
Cool, because it is for infrequent access while still keeping blobs online and immediately available.
The Cool access tier is designed for data that is infrequently accessed but must remain immediately available (online) without any rehydration delay. Since the legal department needs instant access during quarterly audits, Cool meets the requirement of low retrieval cost while keeping blobs online, unlike Archive which requires hours-long rehydration.
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 access and always costs the least to retrieve.
Why it's wrong here
The Hot tier is engineered for high-frequency access, and while its retrieval cost is lower, its per-GB storage price is significantly higher than Cool or Archive. Claiming it 'always costs the least to retrieve' overstates the benefit: for data accessed only quarterly, the storage cost savings from Cool overshadow occasional retrieval fees. Therefore, Hot's primary advantage is latency and access frequency, not long-term cost efficiency for rarely used assets.
When this WOULD be correct
An administrator needs to store data that is accessed and modified frequently (e.g., daily active project files) and requires low-latency access. The Hot tier would be correct because it offers the lowest access costs for frequent operations and keeps blobs online.
- ✓
Cool, because it is for infrequent access while still keeping blobs online and immediately available.
Why this is correct
The Cool access tier is designed for data that is infrequently accessed (typically fewer than a few times a year) but must remain immediately accessible. Because Cool keeps blobs online, users can open files in real time during quarterly audits without incurring rehydration latency or additional Archive retrieval charges. It balances lower storage costs relative to Hot with a modest retrieval fee, making it the most cost-effective tier for this legal department's infrequent, but time-sensitive, access pattern.
- ✗
Archive, because it is the cheapest choice for data that is rarely used and can be restored instantly.
Why it's wrong here
Although Archive has the lowest monthly storage cost, its blobs are offline and must be rehydrated before reading, a process that can take from 15 minutes to several hours. The case requirement demands users open video files immediately during audits, which Archive cannot guarantee without manually starting rehydration in advance. Additionally, Archive incurs an early-deletion penalty and a higher data retrieval charge, undermining the apparent 'cheapest' label for this use case.
When this WOULD be correct
When the question states that data is rarely accessed and a retrieval delay of several hours is acceptable, such as for long-term backup or compliance archives where instant access is not needed.
- ✗
Premium, because it is intended for workload bursts and gives the best long-term storage economics.
Why it's wrong here
Premium Blob Storage is backed by high-performance SSD and is meant for workloads needing low, consistent latency and high transaction rates, not cost-optimized retention. Its pricing is far higher than even the Hot tier on a per-GB basis, so relying on Premium for long-term storage would escalate costs dramatically. There is no 'best long-term storage economics' benefit; it is a performance choice for applications like analytics or interactive workloads, not for quarterly legal audits.
When this WOULD be correct
An administrator needs to store data for a high-traffic web application that requires consistently low latency (e.g., sub-10 ms) and high throughput, such as a real-time analytics dashboard or an e-commerce product catalog. Premium tier would be correct for such performance-sensitive workloads.
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.
✓Cool, because it is for infrequent access while still keeping blobs online and immediately available.Correct answer▾
Why this is correct
The Cool access tier is designed for data that is infrequently accessed (typically fewer than a few times a year) but must remain immediately accessible. Because Cool keeps blobs online, users can open files in real time during quarterly audits without incurring rehydration latency or additional Archive retrieval charges. It balances lower storage costs relative to Hot with a modest retrieval fee, making it the most cost-effective tier for this legal department's infrequent, but time-sensitive, access pattern.
✗Hot, because it is optimized for frequent access and always costs the least to retrieve.Wrong answer — click to see why▾
Why this is wrong here
The Hot tier is optimized for frequent access and has higher storage costs, but the scenario requires infrequent access (quarterly audits) with immediate availability. The Hot tier would be unnecessarily expensive for data accessed only a few times per year.
★ When this WOULD be the correct answer
An administrator needs to store data that is accessed and modified frequently (e.g., daily active project files) and requires low-latency access. The Hot tier would be correct because it offers the lowest access costs for frequent operations and keeps blobs online.
Why candidates choose this
Candidates may assume 'Hot' is always the best for immediate access, overlooking that Cool also provides instant access at lower storage cost for infrequent use. They might not differentiate between access cost and storage cost.
✗Archive, because it is the cheapest choice for data that is rarely used and can be restored instantly.Wrong answer — click to see why▾
Why this is wrong here
Archive tier requires rehydration (which can take hours) to make blobs readable, contradicting the requirement that files must open immediately without waiting.
★ When this WOULD be the correct answer
When the question states that data is rarely accessed and a retrieval delay of several hours is acceptable, such as for long-term backup or compliance archives where instant access is not needed.
Why candidates choose this
Candidates see 'rarely used' and 'cheapest' and assume Archive is best, overlooking the critical requirement for immediate access without rehydration delay.
✗Premium, because it is intended for workload bursts and gives the best long-term storage economics.Wrong answer — click to see why▾
Why this is wrong here
Premium tier is designed for high-performance, low-latency access with Azure Premium SSD storage, not for long-term archival or cost-effective infrequent access. It is significantly more expensive and not intended for rarely accessed data like quarterly audit files.
★ When this WOULD be the correct answer
An administrator needs to store data for a high-traffic web application that requires consistently low latency (e.g., sub-10 ms) and high throughput, such as a real-time analytics dashboard or an e-commerce product catalog. Premium tier would be correct for such performance-sensitive workloads.
Why candidates choose this
Candidates may confuse 'premium' with 'best overall' or assume it offers the best long-term economics, not realizing it is optimized for performance, not cost savings on infrequently accessed data.
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
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.