29 Questions
What is the main advantage of Contiguous Allocation?
Best performance in most cases.
What is a problem associated with Contiguous Allocation?
Finding space for files
What is an extent in Extent-Based Systems?
A contiguous block of disks
What is a disadvantage of Linked Allocation?
Reliability can be a problem
What is the main advantage of Linked Allocation?
No external fragmentation
What is the purpose of a free space management system in Linked Allocation?
To manage disk space efficiently
How does a FAT (File Allocation Table) variation work?
It uses a table to index block numbers
What is the purpose of a vnode in Virtual File Systems?
To hold inodes or network file details
What is the main idea behind Virtual File Systems?
To provide a common interface for different file systems
What is the purpose of a function table in VFS?
To hold addresses of routines to implement functions
What is the primary purpose of consistency checking?
To fix inconsistencies between directory structure and data blocks on disk
What is the main advantage of log-structured file systems?
Faster recovery from crashes and reduced chance of metadata inconsistency
What is the primary function of the NFS protocol?
To enable remote access to files across LANs or WANs
What is the purpose of the mount operation in NFS?
To create a logical connection between client and server, enabling file access
What is the function of the export list in NFS?
To specify remote file systems that a server exports for mounting
What is the primary purpose of the file handle in NFS?
To identify the mounted directory within the exported file system
What is the benefit of using RPC (Remote Procedure Call) in NFS?
Independence from specific machine and network architectures
What is the primary advantage of using XDR (External Data Representation) in NFS?
Independence from specific machine and network architectures
What is the purpose of the mount request in NFS?
To specify the remote directory to be mounted
What is the benefit of using NFS in a heterogeneous environment?
Ability to share files among different machines and operating systems
What is the primary purpose of the Virtual File System (VFS) layer in the NFS architecture?
To distinguish between local and remote files
In the NFS protocol, how are modified data committed to the server's disk?
Before results are returned to the client
What is the primary advantage of using a directory name lookup cache in NFS?
Faster lookup times for remote directory names
What is the purpose of the file-attribute cache in NFS?
To validate cached file attributes
What is the primary difference between the NFS protocol and NFS V4?
NFS V4 is a stateful protocol, while NFS is stateless
What is the primary purpose of the WAFL file system?
To provide a distributed file system for Network Appliance devices
What is the purpose of the snapshot feature in the WAFL file system?
To provide a backup mechanism for files
What is the primary concern in free-space management?
Maintaining a consistent view of free space between disk and memory
What is the purpose of the bit map in free-space management?
To track free space on disk
Learn about Virtual File Systems (VFS) in Unix, which provide an object-oriented way of implementing file systems, allowing the same system call interface for different types of file systems. Understand how VFS separates generic operations from implementation details and enables multiple file system types.
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