Understanding the Linux VFS Superblock Object
In the context of the Linux Virtual File System (VFS), the superblock object is a fundamental data structure.
Its primary role is to represent and contain metadata about an entire file system.
Superblock Key Information
- It holds crucial information specific to a particular mounted file system.
- This includes details like the file system type, size, total block count, and the number of free blocks.
- It also stores pointers to other important file system structures, like the root directory inode.
Superblock Role in Mounting
The superblock is the first data block read from a storage device when a file system is mounted. It serves as the entry point for accessing the file system's contents and managing its operations within the Linux OS.
Therefore, the superblock object represents an entire file system.
Important Questions from File System
Consider the following statements :
(a) UNIX provides three types of permissions
Read
Write
Execute
(b) UNIX provides three sets of permissions
permission for owner
permission for group
permission for others
Which of the above statement/s is/are true ?
Match the following WINDOWS system calls and UNIX system calls with reference to process control and File manipulation.
Windows
UNIX
A. Create-process( )
I. Open( )
B. WaitForSingleObject( )
II. Close( )
C. CreateFile( )
III. Fork( )
D. CloseHandle( )
IV. Wait( )
What type of errors are not detected by assembler?
- To keep track of free blocks in a file system, one of the two approaches is generally used – using bitmaps (bit vectors) or using linked lists. Consider that the linked list approach is used to keep track of free blocks in a file system. Assume that the disk size is 16 GB, block size is 2 KB, and block numbers used are 32-bit long. A single pointer of size 4 bytes is used in each block of the list to point to the next block of the list. The number of blocks required to hold the free disk block numbers is ____________. (answer in integer)
Note: 1K=$2^{10}$ and 1G=$2^{30}$ What does Ctrl + = key effect in MS Word
