The correct choice is to use Azure Blob Storage lifecycle management to move files from hot to cool after 30 days. This strategy directly addresses the need for instant accessibility during the first month by keeping files in the hot tier, then automatically transitioning them to the cool tier to reduce storage costs once access frequency drops, all while maintaining the same low-latency retrieval. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your understanding of Azure Blob Storage lifecycle management for cost optimization, a core design principle for data storage solutions. A common trap is assuming that moving to the archive tier would save even more money, but that would sacrifice instant accessibility, as archive requires rehydration delays. Remember the memory tip: “Hot for now, cool for later” — lifecycle rules let you automate tier transitions based on age, balancing cost and performance without manual intervention.
AZ-305 Design data storage solutions Practice Question
This AZ-305 practice question tests your understanding of design data storage solutions. 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.
A media company needs to store large video files that are frequently accessed for the first month, then infrequently after that. They want to minimize storage costs while ensuring files are instantly accessible when needed. Which storage strategy should they implement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Azure Blob Storage lifecycle management to move files from hot to cool after 30 days
Option D is correct because Azure Blob Storage lifecycle management allows you to define rules that automatically transition blobs from the hot tier (frequent access) to the cool tier (infrequent access) after a specified number of days. This meets the requirement of instant accessibility for the first month and cost minimization thereafter, as the cool tier offers lower storage costs with the same low-latency access as the hot tier.
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.
✗
Store all files in the hot access tier
Why it's wrong here
Hot tier is expensive for infrequently accessed data.
✗
Manually move files between tiers using AzCopy
Why it's wrong here
Manual tiering is inefficient and error-prone.
✗
Store all files in the archive access tier
Why it's wrong here
Archive tier has high retrieval latency.
✓
Use Azure Blob Storage lifecycle management to move files from hot to cool after 30 days
Why this is correct
Lifecycle management automates tiering to optimize cost and access.
Clue confirmation
The clue words "first", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose manual tiering (Option B) thinking it offers more control, but the exam tests the understanding that Azure's built-in lifecycle management is the automated, cost-optimized solution for predictable access patterns, and that archive tier (Option C) is not instantly accessible.
Detailed technical explanation
How to think about this question
Azure Blob Storage lifecycle management policies are evaluated daily and can transition blobs between hot, cool, and archive tiers based on the 'last modified' or 'creation time' age. The cool tier is optimized for data that is accessed less than once per month, offering lower storage costs than hot but with the same millisecond latency for reads, making it ideal for this pattern. A common real-world scenario is media companies storing raw footage that is actively edited for 30 days and then archived for compliance, where lifecycle rules automate the tier transition without manual intervention.
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-305 question in full detail.
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Azure Blob Storage lifecycle management to move files from hot to cool after 30 days — Option D is correct because Azure Blob Storage lifecycle management allows you to define rules that automatically transition blobs from the hot tier (frequent access) to the cool tier (infrequent access) after a specified number of days. This meets the requirement of instant accessibility for the first month and cost minimization thereafter, as the cool tier offers lower storage costs with the same low-latency access as the hot tier.
What should I do if I get this AZ-305 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: "first", "minimum / minimize". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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. Your company has a large number of unstructured files (images, videos) that need to be stored cost-effectively in Azure. The data is accessed infrequently but must be available within minutes when needed. Which storage tier should you recommend?
easy
A.Premium tier.
B.Archive tier.
✓ C.Cool tier.
D.Hot tier.
Why C: Option B is correct because the Cool tier is for infrequently accessed data with immediate availability and lower cost than Hot. Option A is wrong because Hot tier is for frequently accessed data and costs more. Option C is wrong because Archive tier has a retrieval time of hours. Option D is wrong because Premium tier is for low-latency, high-performance scenarios.
Variation 2. A media company needs to store large volumes of video files that are processed by an application. The files are accessed via REST APIs and are rarely accessed after the first few days. The company wants to minimize storage costs by automatically moving older files to a cheaper storage tier without any manual intervention. Which Azure storage solution should they use, and which feature should they configure?
medium
✓ A.Azure Blob Storage with lifecycle management policies
B.Azure Files with tiering
C.Azure NetApp Files with capacity pools
D.Azure Disk Storage with managed disks
Why A: Azure Blob Storage with lifecycle management policies is the correct solution because it allows you to define rules that automatically move blobs to cooler tiers (e.g., from Hot to Cool to Archive) based on age or last modification time, minimizing storage costs without manual intervention. The REST API access requirement is natively supported by Blob Storage via HTTPS, and the large video file workload fits well within its object storage capabilities.
Last reviewed: Jun 24, 2026
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This AZ-305 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-305 exam.
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