Two of the most common data locations on Databricks are the DBFS root storage and external object storage mounted with dbutils.fs.mount(). Which of the following statements is correct?

Question

Options

• ADBFS is a file system protocol that allows users to interact with files stored in object storage using
• BBy default, both the DBFS root and mounted data sources are only accessible to workspace
• CThe DBFS root is the most secure location to store data, because mounted storage volumes must
• DNeither the DBFS root nor mounted storage can be accessed when using %sh in a Databricks
• EThe DBFS root stores files in ephemeral block volumes attached to the driver, while mounted

• A
  87% (48)
• B
  2% (1)
• C
  7% (4)
• E
  4% (2)

Explanation

DBFS (Databricks File System) is an abstraction layer - a distributed file system protocol - that maps file-path-style operations onto underlying cloud object storage (e.g., AWS S3, Azure ADLS, GCS). It does not store files locally on cluster nodes; all data lives in cloud object storage. Option B is false - both DBFS and mounts are accessible to all users in the workspace by default, which is actually a security concern. Option C is backwards - DBFS root is considered LESS secure than properly governed external storage because all workspace users share access. Option D is false - both DBFS and mounts can be accessed via %sh using the /dbfs mount path. Option E is false - DBFS root does not use ephemeral block volumes attached to the driver.

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