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Operating System Concepts: Virtual File Systems

Learn about Virtual File Systems (VFS) in Unix, an object-oriented approach to implementing file systems. Understand how VFS allows for modular and extensible design with a unified system call interface.

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Questions and Answers

What is the primary advantage of using a Virtual File System (VFS)?

Modular and extensible design

What is the purpose of the system call interface (API) in VFS?

To provide a common interface for different file systems

What type of design approach is used in VFS?

Object-oriented

What is the function of the function table in VFS?

<p>To hold addresses of routines to implement file system operations</p> Signup and view all the answers

What type of object represents an individual directory entry in VFS?

<p>Dentry</p> Signup and view all the answers

What is stored sequentially in a directory using a linear list implementation?

<p>File names and pointers to their associated data blocks</p> Signup and view all the answers

What is the primary function of the boot control block in a file system?

<p>To contain information needed by the system to boot the OS from that volume</p> Signup and view all the answers

What is the purpose of the volume control block in a file system?

<p>To contain volume details such as total number of blocks and block size</p> Signup and view all the answers

What is the benefit of having multiple file systems within an operating system?

<p>It enables the use of different file formats such as ISO 9660 and UFS</p> Signup and view all the answers

What is the role of the operating system in implementing a file system?

<p>It provides a modular design for the file system implementation</p> Signup and view all the answers

What is the significance of the superblock in a Unix file system?

<p>It contains volume details such as total number of blocks and block size</p> Signup and view all the answers

What is the purpose of on-disk and in-memory structures in a file system?

<p>To implement a file system</p> Signup and view all the answers

What happens when a file system implementation creates all FCBs at file-system creation time?

<p>An FCB is allocated from the set of free FCBs</p> Signup and view all the answers

What is the purpose of a boot block in a file system?

<p>To point to the boot volume or boot loader</p> Signup and view all the answers

What is typically contained in the root partition of a file system?

<p>The OS files and system directories necessary for booting</p> Signup and view all the answers

What happens to other partitions during the boot process?

<p>They are mounted automatically or manually</p> Signup and view all the answers

What is checked during the mount time of a file system?

<p>The file system's consistency</p> Signup and view all the answers

What is the primary purpose of a file control block (FCB)?

<p>To represent a file in a file system</p> Signup and view all the answers

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