AZ-104 Implement and Manage Storage Practice Question
You have a storage account that stores infrequently accessed data that must remain available immediately when requested. You need to minimize storage costs. Which access tier should you use?
⚠ Common exam trap
Test-takers frequently choose Archive for its lowest storage cost, overlooking the critical requirement for immediate availability, which Archive cannot provide due to its mandatory rehydration latency.
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 designed for data that is infrequently accessed but still requires immediate availability when requested, offering lower storage costs than the Hot tier while maintaining low latency access. Since the data must remain available immediately, the Archive tier is unsuitable due to its multi-hour retrieval latency, and the Premium tier is optimized for high-performance scenarios, not cost minimization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Premium
Why it's wrong here
Premium is backed by SSD storage and is intended for sub-millisecond latency and high IOPS, usually for VHDs or interactive workloads, making it the most expensive per gigabyte of all tiers. For infrequently accessed data, those performance guarantees are wasted because the data is not being read often enough to benefit, and the storage cost will far exceed any practical savings. Thus Premium is wrong because it optimizes for performance, not for cost efficiency on a cold dataset.
When this WOULD be correct
A question requiring sub-millisecond latency for frequently accessed data (e.g., a real-time analytics application) would make Premium the correct answer. The scenario would emphasize performance over cost.
- ✗
Hot
Why it's wrong here
Hot tier is optimized for frequent access and high throughput, with storage costs several times higher than Cool because it assumes steady operational workloads. Using Hot for data that is rarely read simply pays a premium for capacity that is almost never utilized, so it fails the cost-minimization goal even though it delivers identical latency. The scenario's description of infrequently accessed data makes Hot an unnecessary expense rather than a technical deficiency.
When this WOULD be correct
When the question specifies that data is accessed frequently (e.g., multiple times per day) and requires low latency, the Hot tier is the correct choice to balance performance and cost.
- ✓
Cool
Why this is correct
Cool tier is designed for data that is accessed infrequently but requires immediate availability, offering lower storage costs than Hot while keeping negligible retrieval latency. Its access charges are higher, but that is outweighed by the storage savings when reads are sparse, which directly matches the scenario's profile. Therefore Cool is the correct tier because it minimizes idle storage cost without forcing you to rehydrate the data before reading it.
- ✗
Archive
Why it's wrong here
Archive offers the lowest storage cost by placing data in an offline state that requires a rehydration step of up to several hours before the blob can be accessed. The question says the data must be infrequently accessed but does not say it can tolerate that rehydration delay, so Archive sacrifices the immediate availability requirement. Consequently Archive is wrong even though its raw price per GB is lower than Cool, because availability and retrieval time are part of the SLA.
When this WOULD be correct
When the question specifies that data is rarely accessed, can tolerate retrieval delays of up to 15 hours, and the primary goal is to minimize storage costs without any immediate availability requirement.
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 tier is designed for data that is accessed infrequently but requires immediate availability, offering lower storage costs than Hot while keeping negligible retrieval latency. Its access charges are higher, but that is outweighed by the storage savings when reads are sparse, which directly matches the scenario's profile. Therefore Cool is the correct tier because it minimizes idle storage cost without forcing you to rehydrate the data before reading it.
✗PremiumWrong answer — click to see why▾
Why this is wrong here
Premium tier is designed for low-latency, high-performance workloads, not for infrequently accessed data. It costs significantly more than Cool tier, so it does not minimize storage costs for this scenario.
★ When this WOULD be the correct answer
A question requiring sub-millisecond latency for frequently accessed data (e.g., a real-time analytics application) would make Premium the correct answer. The scenario would emphasize performance over cost.
Why candidates choose this
Candidates may assume 'Premium' implies better overall value or mistakenly think it offers lower costs for infrequent access due to its name, without understanding its high cost structure.
✗HotWrong answer — click to see why▾
Why this is wrong here
The Hot tier is designed for frequently accessed data, not infrequently accessed data. Using it would incur higher storage costs than necessary for data that is rarely accessed.
★ When this WOULD be the correct answer
When the question specifies that data is accessed frequently (e.g., multiple times per day) and requires low latency, the Hot tier is the correct choice to balance performance and cost.
Why candidates choose this
Candidates may think 'Hot' implies immediate availability, but they overlook the 'infrequently accessed' constraint, mistakenly prioritizing availability over cost optimization.
✗ArchiveWrong answer — click to see why▾
Why this is wrong here
The Archive tier has the lowest storage cost but requires hours to rehydrate data before access, violating the requirement that data must remain available immediately when requested.
★ When this WOULD be the correct answer
When the question specifies that data is rarely accessed, can tolerate retrieval delays of up to 15 hours, and the primary goal is to minimize storage costs without any immediate availability requirement.
Why candidates choose this
Candidates may assume that 'infrequently accessed' automatically means the cheapest tier (Archive) is best, overlooking the critical constraint of immediate availability.
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?”
Go deeper
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Key term
Availability
Availability is the measure of how often a system or service is operational and accessible when needed, typically expressed as a percentage of uptime.
Key term
Hot tier
Hot tier is a storage category used for data that is accessed frequently and needs fast retrieval, typically stored on high-performance hardware like SSDs.
About these practice questions
This AZ-104 question is part of Courseiva's 1,049-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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. An archive of legal documents is accessed only a few times each month, but when someone needs a document it must open immediately without a rehydration wait. Which access tier should be used?
easy- A.Hot tier
- ✓ B.Cool tier
- C.Archive tier
- D.Geo-redundant storage (GRS)
Why B: The Cool tier is designed for data that is infrequently accessed but must be available immediately when needed, with a lower storage cost than Hot tier but higher access costs. Since the archive is accessed only a few times per month and requires instant retrieval without rehydration delay, Cool tier meets both requirements, whereas Archive tier would impose a rehydration wait of up to 15 hours.
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.