AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which Azure storage tier should you use for data that is stored for at least 180 days and is rarely accessed?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Archive tier
The Archive tier is designed for data that is rarely accessed and has a minimum storage duration of 180 days. It offers the lowest storage cost but requires several hours to rehydrate data before it can be read, making it ideal for long-term backup or compliance data that is infrequently needed.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 tier
Why it's wrong here
Hot tier is for frequently accessed data — highest storage cost, lowest access cost.
✗
Cool tier
Why it's wrong here
Cool tier is for infrequently accessed data stored for at least 30 days, with faster retrieval than Archive.
✓
Archive tier
Why this is correct
Archive tier is for rarely accessed data stored for 180+ days — lowest storage cost but slowest retrieval.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Standard tier
Why it's wrong here
'Standard' refers to performance tier (vs. Premium) in Azure Storage, not an access frequency tier.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the Cool tier's 30-day minimum with the Archive tier's 180-day minimum, or mistakenly think 'Standard' is a valid access tier, when in fact Azure Blob Storage only offers Hot, Cool, and Archive as access tiers.
Detailed technical explanation
How to think about this question
Under the hood, the Archive tier stores data offline, meaning it is not immediately accessible via read or write operations. To access archived data, you must initiate a rehydration process that changes the blob's tier to Hot or Cool, which can take up to 15 hours for high-priority rehydration or longer for standard priority. This tier is commonly used for regulatory compliance data, such as financial records that must be retained for years but are rarely queried, where the cost savings offset the latency of retrieval.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Archive tier — The Archive tier is designed for data that is rarely accessed and has a minimum storage duration of 180 days. It offers the lowest storage cost but requires several hours to rehydrate data before it can be read, making it ideal for long-term backup or compliance data that is infrequently needed.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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