Blob storage (block, append, page) in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Blob Types for Different Use Cases

Which Azure Blob storage type is best suited for scenarios where you need to frequently append data, such as logging or auditing?

A Append Blob

B Block Blob

C Page Blob

D File Blob

💡 Hint

Think about which blob type is optimized for adding data at the end without rewriting the entire blob.

Append Blob is designed specifically for append operations, making it ideal for logs and audit trails where data is added sequentially.

❓ service_behavior

intermediate

Page Blob Size Behavior

What happens if you try to write data beyond the current size of a Page Blob in Azure Blob Storage?

A The blob automatically expands to accommodate the new data.

B An error is returned because writes must be within the allocated size.

C The data is truncated to fit the current blob size.

D The blob converts to a Block Blob to allow the write.

💡 Hint

Consider how Page Blobs manage storage allocation and writes.

Page Blobs require pre-allocated size and writes must be within this size. Writing beyond causes an error.

❓ Configuration

advanced

Configuring Blob Storage for Large File Uploads

You want to upload a 200 GB file to Azure Blob Storage efficiently. Which blob type and upload method combination is the best practice?

A Use Block Blob with Put Block and Put Block List operations to upload in chunks.

B Use Append Blob with multiple Append Block operations.

C Use Block Blob with Put Blob operation in a single request.

D Use Page Blob with random writes to upload the file sequentially.

💡 Hint

Think about how to upload large files in parts efficiently.

Block Blobs support chunked uploads using Put Block and Put Block List, which is efficient for large files.

❓ security

advanced

Securing Append Blob for Audit Logs

Which security feature should you enable to ensure that audit logs stored in Append Blobs cannot be modified or deleted once written?

A Enable Soft Delete on the storage account.

B Enable Shared Access Signature (SAS) with write permissions.

C Enable Azure Defender for Storage.

D Enable Immutable Blob Storage with Time-based retention policy.

💡 Hint

Consider how to make blobs unchangeable after creation.

Immutable Blob Storage with retention policies ensures data cannot be modified or deleted during the retention period, ideal for audit logs.

❓ Architecture

expert

Designing a High-Performance VM Disk Storage Solution

You need to design a storage solution for Azure Virtual Machines that require frequent random read/write operations with low latency. Which blob type should you use and why?

A Use Append Blob because it allows efficient appending of data.

B Use Block Blob because it supports large files and efficient uploads.

C Use Page Blob because it supports random read/write operations with low latency.

D Use File Blob because it supports SMB protocol for VM disks.

💡 Hint

Think about the storage type Azure uses for VM disks and their access patterns.

Page Blobs are used for Azure VM disks because they support random read/write with low latency, which is essential for VM performance.