Quick Answer
The answer is Azure Blob Storage, as it is the most cost-effective Azure storage solution for images accessed frequently from a web app. Blob Storage is purpose-built for storing massive amounts of unstructured binary data, such as images, and offers tiered pricing (like Hot, Cool, and Archive) that allows you to optimize costs based on access patterns—for frequently accessed images, the Hot tier provides low-latency access at a competitive price per gigabyte. On the AZ-204 exam, this question tests your ability to match Azure services to specific workload requirements, often appearing as a scenario where you must distinguish Blob Storage from Azure Files (a managed file share for SMB protocols), Cosmos DB (a NoSQL database for structured data), or Queue Storage (for message queuing). A common trap is confusing Blob Storage with Azure Files because both handle files, but remember: Blobs are for object storage like images and videos, while Files is for shared network drives. Memory tip: think “Blob for blob-like binary objects” and “Hot tier for hot data accessed often.”
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party 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.
A developer needs to store a large number of binary files (images) that are accessed frequently from a web app. Which Azure storage solution is most cost-effective?
Azure Queue Storage
Why wrong: Queue Storage is for messages, not for storing files.
Azure Files
Why wrong: Azure Files is for SMB file shares, not ideal for large numbers of images.
Azure Blob Storage
Blob Storage is designed for large-scale unstructured data and is cost-effective for images.
Azure Cosmos DB
Why wrong: Cosmos DB is a NoSQL database, expensive for storing large binary files.
Answer choices
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
Option A is correct because Blob Storage is optimized for storing large amounts of unstructured data like images. Option B (Azure Files) is for file shares; Option C (Cosmos DB) is a database; Option D (Queue Storage) is for messages.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Queue Storage
Why it's wrong here
Queue Storage is for messages, not for storing files.
Azure Files
Why it's wrong here
Azure Files is for SMB file shares, not ideal for large numbers of images.
Azure Blob Storage
Why this is correct
Blob Storage is designed for large-scale unstructured data and is cost-effective for images.
Related concept
Read the scenario before looking for a memorised answer.
Azure Cosmos DB
Why it's wrong here
Cosmos DB is a NoSQL database, expensive for storing large binary files.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which AZ-204 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Blob Storage — Option A is correct because Blob Storage is optimized for storing large amounts of unstructured data like images. Option B (Azure Files) is for file shares; Option C (Cosmos DB) is a database; Option D (Queue Storage) is for messages.
Identify which AZ-204 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This AZ-204 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-204 exam.
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