Developing Solutions for Microsoft Azure (AZ-204) Practice Exam

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In Azure storage, which blob type supports random access files up to 8 TB?

Block blobs
Append blobs
Page blobs
Hybrid blobs

The correct answer is: Page blobs

In Azure storage, page blobs are specifically designed to support random access file scenarios, which allows for efficient reading and writing to specific locations within the blob. This type of blob is optimized for scenarios where you need to make changes to a smaller portion of the blob frequently. Page blobs can support large files of up to 8 TB in size, making them very suitable for applications that require random access, such as virtual hard disks (VHDs) used in Azure virtual machines. They are structured in 512-byte pages, which allows for individual pages to be updated without needing to rewrite the entire blob. Other blob types serve different purposes; for instance, block blobs are ideal for streaming and uploading large amounts of text or binary data, while append blobs are optimized for append operations, such as logging scenarios. Hybrid blobs, while not an official term within Azure's storage offerings, typically do not exist as a specific blob type. The unique structure and capabilities of page blobs make them the right choice for the given scenario.