Which of the following blob types is optimized for random read and write operations?

Page Blobs are specifically designed for situations that require frequent random read and write operations. This makes them ideal for scenarios where applications need to store virtual hard disk (VHD) files, as these operations often involve modifying specific sections of the file rather than processing the file sequentially.

The architecture of page blobs allows them to support up to 8 TB in size, and they are divided into 512-byte pages. Each of these pages can be read, written, or updated independently, which enhances the efficiency of random access. By contrast, block blobs are optimized for streaming and are designed for scenarios involving large amounts of data that are uploaded or downloaded in blocks. Append blobs are tailored for append operations, making them suitable for scenarios like logging where data is consistently added but not modified. Standard blobs isn't a recognized type in Azure’s categorization; it likely refers to a general concept rather than a specific blob type optimized for random access.

Thus, the choice of page blobs is particularly relevant for applications requiring high-performance, random-access capabilities, making them the appropriate option in this context.