Azure Blob Storage Cool Tier for Infrequent Access
You need to store data that is rarely accessed but must be retained for 10 years for compliance. The data will be accessed occasionally for audits. Which Azure storage tier is the most cost-effective?
Quick Answer
The answer is the Cool storage tier. This is the correct choice because it is specifically designed for data that is infrequently accessed but must remain immediately available when needed, offering lower storage costs than the Hot tier while still providing low-latency retrieval for occasional audits. For compliance data retained over a 10-year period, the Cool tier balances cost and accessibility perfectly, unlike the Archive tier which requires hours to rehydrate and would be impractical for audit scenarios. On the Microsoft Azure Data Engineer Associate DP-203 exam, this question tests your understanding of Azure Blob Storage access tiers and their trade-offs between cost and latency—a common trap is choosing Archive for long-term retention without considering the need for occasional access. Remember the memory tip: “Cool for occasional, Archive for frozen.”
⚠ Common exam trap
Candidates often choose Archive tier for long-term retention without considering the access latency requirement for audits, assuming 'rarely accessed' means never needing quick access.
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 storage tier
The Cool storage tier is designed for data that is infrequently accessed and stored for at least 30 days, making it a cost-effective choice for compliance data accessed occasionally over a 10-year period. It offers lower storage costs than Hot tier while still providing low-latency access for audits, unlike Archive which requires hours to rehydrate.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cool storage tier
Why this is correct
Cool tier is designed for infrequently accessed data with lower storage cost.
- ✗
Hot storage tier
Why it's wrong here
Hot tier is for frequently accessed data and is more expensive.
- ✗
Archive storage tier
Why it's wrong here
Archive has high retrieval cost and latency; not suitable for occasional audits.
- ✗
Premium storage tier
Why it's wrong here
Premium is for high-performance scenarios, not cost-effective for rarely accessed data.
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Same concept, more angles
1 more way this is tested on DP-203
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. Which TWO Azure Blob Storage access tiers are suitable for data that must be available within milliseconds but is accessed infrequently (e.g., once per month)?
medium- ✓ A.Cool
- ✓ B.Hot
- C.Premium
- D.Cold
- E.Archive
Why A: Both the Hot and Cool access tiers provide millisecond latency, making them suitable for data that must be available quickly. While Hot is designed for frequently accessed data, it still meets the latency requirement for infrequently accessed data. Cool is optimized for infrequently accessed data (e.g., once per month) with a lower storage cost and higher access cost, making it the more cost-effective choice for such usage. Therefore, both tiers are appropriate for the described scenario.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-203 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 DP-203 exam.