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Questions and Answers
Encryption is a method of access control that restricts access to files and directories based on user identity.
Encryption is a method of access control that restricts access to files and directories based on user identity.
False (B)
The SCAN disk scheduling algorithm schedules requests in a circular order, minimizing head movement.
The SCAN disk scheduling algorithm schedules requests in a circular order, minimizing head movement.
True (A)
In contiguous allocation, a series of blocks is linked together by pointers.
In contiguous allocation, a series of blocks is linked together by pointers.
False (B)
Directories are used to organize files into a hierarchical structure.
Directories are used to organize files into a hierarchical structure.
The File Allocation Table (FAT) is a data structure that contains metadata about a file.
The File Allocation Table (FAT) is a data structure that contains metadata about a file.
In linked allocation, each file is a linked list of ______ blocks.
In linked allocation, each file is a linked list of ______ blocks.
Access Control Lists (ACLs) define permissions for each user or ______.
Access Control Lists (ACLs) define permissions for each user or ______.
Partitioning is a method of ______ management that divides the disk into logical partitions.
Partitioning is a method of ______ management that divides the disk into logical partitions.
The First-Come-First-Served (FCFS) scheduling algorithm serves requests in the order they ______.
The First-Come-First-Served (FCFS) scheduling algorithm serves requests in the order they ______.
File attributes store metadata about files, including ______ and timestamps.
File attributes store metadata about files, including ______ and timestamps.
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Study Notes
File System Implementation
File System Security
- Access Control: restricts access to files and directories based on user identity, group membership, or permissions
- Access Control Lists (ACLs): defines a set of permissions for a specific user or group
- File Permissions: read, write, execute permissions for owner, group, and others
- Encryption: protects data from unauthorized access
Disk Scheduling
- Disk Scheduling Algorithms: optimize disk access to improve performance
- FCFS (First-Come-First-Served): schedules requests in the order they arrive
- SSTF (Shortest Seek Time First): schedules requests based on the shortest distance from the current head position
- SCAN (Elevator Algorithm): schedules requests in a circular order, minimizing head movement
- C-SCAN (Circular SCAN): variant of SCAN, returns to the starting point after completing a cycle
File Allocation Methods
- Contiguous Allocation: allocates a contiguous block of disk space for a file
- Linked Allocation: allocates a series of blocks linked together by pointers
- Indexed Allocation: uses an index block to store pointers to file blocks
File Organization
- File Systems: organize files on a disk, providing a hierarchical structure
- Directories: organize files into a hierarchical structure
- Subdirectories: allow for further organization of files
- File Naming Conventions: rules for naming files, such as extensions and characters allowed
Storage Management
- ** Disk Space Management**: manages free and allocated disk space
- File Allocation Table (FAT): a table that keeps track of allocated and free disk space
- Inode (Index Node): a data structure that contains metadata about a file
- Block Allocation: allocates disk space in fixed-size blocks
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