AZ-104 Implement and Manage Storage Practice Question
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?
⚠ Common exam trap
It's easy for candidates to choose Archive thinking it is the cheapest option, but they overlook the requirement for 'immediate readability without waiting for rehydration,' which Archive cannot satisfy.
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
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.
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 for data that is accessed frequently and has the highest storage cost among the standard online tiers. These financial statements are only accessed occasionally, so storing them on Hot would incur ongoing expenses far above what Cool requires. While Hot provides rapid access, that speed is not needed for this workload, making it a cost-inefficient choice for long-term storage.
When this WOULD be correct
When the question specifies that data is accessed frequently (e.g., multiple times per day) and low latency is critical, but cost optimization is not the primary concern.
- ✓
Cool
Why this is correct
Cool is the correct access tier for long-term financial statements because it offers a low storage cost while keeping data online and immediately accessible. Unlike Hot, Cool is optimized for data that is infrequently read but may be needed on short notice, with no rehydration step. With a minimum retention period of 30 days, it fits a scenario where files are retained for years but rarely accessed, balancing cost and availability.
- ✗
Archive
Why it's wrong here
Archive offers the lowest storage cost but requires data to be rehydrated before reading, which can take up to 15 hours. Since the financial statements must remain immediately available for audits or regulatory requests, the rehydration latency violates a core requirement. Even though Archive is meant for long-term retention, it is designed for data that is never accessed directly, making it inappropriate here.
When this WOULD be correct
A question where long-term retention (e.g., 7+ years) and lowest storage cost are the only priorities, and immediate access is not needed—e.g., 'You need to store backup tapes for regulatory compliance at the lowest possible cost. Access is expected less than once a year and rehydration time is acceptable.'
- ✗
Premium
Why it's wrong here
Premium is unsuitable because it is designed for high-frequency access with ultra-low latency, typically backed by SSD hardware. This tier incurs significantly higher storage costs per GB than Cool, without providing any benefit for infrequently accessed financial statements. Its performance characteristics are unnecessary for an archival-style workload that simply requires data to remain online, so choosing Premium would waste budget on unneeded speed.
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.
✓CoolCorrect answer▾
Why this is correct
Cool is the correct access tier for long-term financial statements because it offers a low storage cost while keeping data online and immediately accessible. Unlike Hot, Cool is optimized for data that is infrequently read but may be needed on short notice, with no rehydration step. With a minimum retention period of 30 days, it fits a scenario where files are retained for years but rarely accessed, balancing cost and availability.
✗HotWrong 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 to minimize cost for almost never accessed files.
★ When this WOULD be the correct answer
When the question specifies that data is accessed frequently (e.g., multiple times per day) and low latency is critical, but cost optimization is not the primary concern.
Why candidates choose this
Candidates may assume 'Hot' is always the best for immediate access, overlooking that Cool tier also provides immediate access at lower cost for infrequent access patterns.
✗ArchiveWrong answer — click to see why▾
Why this is wrong here
Archive tier requires rehydration (up to 15 hours) to read data, but the question states files must be readable immediately without waiting. Thus, Archive cannot meet the availability requirement.
★ When this WOULD be the correct answer
A question where long-term retention (e.g., 7+ years) and lowest storage cost are the only priorities, and immediate access is not needed—e.g., 'You need to store backup tapes for regulatory compliance at the lowest possible cost. Access is expected less than once a year and rehydration time is acceptable.'
Why candidates choose this
Candidates see 'long-term' and 'almost never accessed' and assume Archive is the cheapest option, overlooking the critical requirement for immediate read access without rehydration delay.
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 →
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.