Azure Blob Storage is the correct choice because it is specifically engineered to store and serve large binary files like images and videos while supporting both public and private access through HTTPS URLs. This service excels at handling unstructured data at scale, offering public anonymous read access via container-level policies and private access through shared access signatures or Azure AD authentication, all while maintaining 11 nines of durability and cost-effective tiered storage for terabytes of data. On the AZ-305 exam, this scenario tests your understanding of matching workload requirements to the correct Azure storage solution, often appearing as a distractor where candidates might mistakenly choose Azure Files (for SMB shares) or Azure Disk Storage (for VM disks) instead of recognizing Blob Storage’s native support for direct HTTP access and granular access control. A common trap is overlooking that public access can be set at the container or blob level, while private access uses SAS tokens or RBAC—both fully supported by Blob Storage. Memory tip: think “BLOB = Big Large Object Blobs” for binary files, and remember that SAS tokens are your key to private access.
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 company needs to store and retrieve large binary files (e.g., images and videos) for a web application. The data must be accessible via HTTPS URLs and support both public read access for anonymous users and private access for administrators. The solution must be highly durable and cost-effective for storing terabytes of data. Which Azure storage solution should they recommend?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Blob Storage
Azure Blob Storage is the correct choice because it is designed for storing large amounts of unstructured data, such as images and videos, and supports both public anonymous read access (via a public container or blob-level access policy) and private access (via shared access signatures or Azure AD authentication). It provides HTTPS URL access for direct retrieval, offers 99.9999999999% (11 nines) durability for hot and cool tiers, and is cost-effective for terabytes of data due to its tiered storage options (hot, cool, archive).
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.
✓
Azure Blob Storage
Why this is correct
Blob Storage is optimized for storing large amounts of unstructured data and supports both public and private access levels.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Files
Why it's wrong here
Azure Files provides fully managed file shares accessed via SMB, not HTTP/HTTPS URLs for public access.
✗
Azure Queue Storage
Why it's wrong here
Queue Storage is for storing messages for asynchronous processing, not for large binary files.
✗
Azure Table Storage
Why it's wrong here
Table Storage is a NoSQL key-value store for structured data, not for large binary files.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Azure Files (a managed file share) with Blob Storage because both can store files, but Azure Files uses SMB/NFS protocols and is not designed for direct HTTPS URL access or public anonymous read for large binary objects.
Detailed technical explanation
How to think about this question
Azure Blob Storage supports two types of blobs: block blobs (optimized for streaming and storing large objects up to ~4.75 TB) and append blobs (for logging). Public access is controlled at the container level via a boolean property, while private access uses SAS tokens with granular permissions (read, write, delete) and expiration times. For cost optimization, the cool tier offers lower storage costs with higher access charges, making it ideal for infrequently accessed data, while the archive tier provides the lowest cost for data that can tolerate hours of retrieval latency.
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: Azure Blob Storage — Azure Blob Storage is the correct choice because it is designed for storing large amounts of unstructured data, such as images and videos, and supports both public anonymous read access (via a public container or blob-level access policy) and private access (via shared access signatures or Azure AD authentication). It provides HTTPS URL access for direct retrieval, offers 99.9999999999% (11 nines) durability for hot and cool tiers, and is cost-effective for terabytes of data due to its tiered storage options (hot, cool, archive).
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.
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 →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.