AZ-104 Implement and Manage Storage Practice Question
An analytics team keeps quarterly telemetry exports in Azure Blob Storage. The files are accessed only a few times per year, but when they are needed they must remain online and immediately readable without any rehydration delay. Which access tier should you use?
⚠ Common exam trap
Candidates often confuse 'rarely accessed' with 'Archive tier,' forgetting that Archive requires rehydration and is not immediately readable, while Cold tier provides online access with lower storage cost for data accessed only a few times per year.
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 is intended for rarely accessed online data with lower storage cost.
The Cold tier is designed for data that is rarely accessed but must remain online with immediate read access, offering lower storage costs than Cool or Hot tiers while avoiding the rehydration delay of Archive. The scenario specifies files are accessed only a few times per year but must be immediately readable without any rehydration delay, which matches Cold tier's purpose of providing online access with no latency for infrequent reads.
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 reads and writes.
Why it's wrong here
Hot is optimized for high transaction rates and frequent reads/writes, with the highest storage cost among the online tiers and no minimum storage duration. Storing quarterly telemetry exports in Hot means paying a premium for a capacity that is rarely used, since analysts only access the data a few times per year. Cold provides the same immediate read access at a significantly lower storage cost, so Hot is technically workable but financially wasteful for this pattern.
When this WOULD be correct
A question where data is accessed frequently (e.g., daily or multiple times per hour) and requires low-latency access, such as a web application serving user-uploaded images in real time.
- ✗
Cool, because it is designed for infrequently accessed data that still stays online.
Why it's wrong here
Cool is an online tier designed for data that is accessed roughly once a month or less, with a 30-day minimum storage duration and per-access (read and write) charges that are higher than Hot. While it keeps blobs immediately readable, its storage price is still higher than Cold, which is specifically engineered for data that is accessed only a few times per year. Because this telemetry is read quarterly, Cold offers the same online availability at a lower storage cost, making Cool a suboptimal but not completely invalid choice.
When this WOULD be correct
A company stores monthly sales reports that are accessed about once a month for analysis. The data must remain online with no rehydration delay. Cool tier would be correct because it balances cost and availability for data accessed roughly every 30 days.
- ✓
Cold, because it is intended for rarely accessed online data with lower storage cost.
Why this is correct
Cold is the best match because the data must remain online and readable immediately, yet is accessed only a few times per year. That makes Archive inappropriate because Archive requires rehydration before reading. Cold gives the team an online tier with lower storage cost than the hotter tiers, while preserving immediate access when an analyst needs the files.
- ✗
Archive, because it is the cheapest tier and can be opened directly in the portal.
Why it's wrong here
Archive is indeed the cheapest storage tier, but blobs in Archive go offline and must be rehydrated to an online tier (Hot, Cool, or Cold) before they can be read. This rehydration process can take up to 15 hours, so you cannot open the file directly in the Azure portal without first waiting for that operation. Additionally, Archive has a 180-day minimum storage duration, and deleting a blob early incurs a prorated penalty, making it unsuitable for quarterly telemetry exports that analysts may need immediately.
When this WOULD be correct
A question where data is accessed very rarely (e.g., once a year or less) and rehydration delay is acceptable, such as long-term compliance archives where cost is the primary concern.
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 is intended for rarely accessed online data with lower storage cost.Correct answer▾
Why this is correct
Cold is the best match because the data must remain online and readable immediately, yet is accessed only a few times per year. That makes Archive inappropriate because Archive requires rehydration before reading. Cold gives the team an online tier with lower storage cost than the hotter tiers, while preserving immediate access when an analyst needs the files.
✗Hot, because it is optimized for frequent reads and writes.Wrong answer — click to see why▾
Why this is wrong here
The Hot tier is optimized for frequent reads and writes, but the question specifies that files are accessed only a few times per year, making Hot unnecessarily expensive due to higher storage costs.
★ When this WOULD be the correct answer
A question where data is accessed frequently (e.g., daily or multiple times per hour) and requires low-latency access, such as a web application serving user-uploaded images in real time.
Why candidates choose this
Candidates may assume 'Hot' is always the safest default for online access, overlooking that the question emphasizes infrequent access and cost optimization.
✗Cool, because it is designed for infrequently accessed data that still stays online.Wrong answer — click to see why▾
Why this is wrong here
Cool tier is designed for infrequently accessed data, but the question specifies 'only a few times per year,' which aligns more with Cold tier's 90-day minimum and lower cost. Cool tier has a 30-day minimum and higher storage cost than Cold, making it less optimal for this access pattern.
★ When this WOULD be the correct answer
A company stores monthly sales reports that are accessed about once a month for analysis. The data must remain online with no rehydration delay. Cool tier would be correct because it balances cost and availability for data accessed roughly every 30 days.
Why candidates choose this
Candidates see 'infrequently accessed' and think Cool is the standard tier for such data, overlooking that 'a few times per year' is even less frequent and better served by Cold tier with lower storage cost.
✗Archive, because it is the cheapest tier and can be opened directly in the portal.Wrong answer — click to see why▾
Why this is wrong here
Archive tier requires rehydration (which can take hours) before data is readable, contradicting the requirement for immediate readability without delay.
★ When this WOULD be the correct answer
A question where data is accessed very rarely (e.g., once a year or less) and rehydration delay is acceptable, such as long-term compliance archives where cost is the primary concern.
Why candidates choose this
Candidates see 'cheapest' and 'rarely accessed' and assume Archive fits, overlooking the critical requirement for immediate online access 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
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.
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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.