Suggested Answer:
A key mechanism that allows Azure Data Lake Storage Gen2 to provide file system performance at object storage scale and prices is the addition of a hierarchical namespace. This allows the collection of objects/files within an account to be organized into a hierarchy of directories and nested subdirectories in the same way that the file system on your computer is organized. With a hierarchical namespace enabled, a storage account becomes capable of providing the scalability and cost-effectiveness of object storage, with file system semantics that are familiar to analytics engines and frameworks. One advantage of hierarchical namespace is atomic directory manipulation: Object stores approximate a directory hierarchy by adopting a convention of embedding slashes (/) in the object name to denote path segments. Reference: https://docs.microsoft.com/en-us/azure/storage/blobs/data-lake-storage-namespace
Answer is correct and able to understand with given reference article.
https://docs.microsoft.com/en-us/azure/storage/blobs/data-lake-storage-namespace
Security at the folder level: With hierarchical namespace enabled, you can set different security permissions (e.g. read, write, delete) on different folders within the storage account, allowing you to better control access to your data.
Atomic directory manipulation: With hierarchical namespace enabled, you can perform atomic operations on directories, such as renaming or moving a directory and all its contents in one single operation. This ensures that the entire operation is completed or rolled back as a whole, avoiding partial changes to the data.
A tricky question:)
Azure Data Lake Storage Gen2 implements an access control model that supports both Azure role-based access control (Azure RBAC) and POSIX-like access control lists (ACLs).
To create Azure Storage account for Data Lake Storage you must enable hierarchal namespace.
Then Answer is A.
I believe the key in this one was to catch the word "folder" in the text. Only hierarchal namespace-based storages (like Data Lake) uses folders.
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