Week 1 Flashcards
What is an Operating System?
A program that controls the execution of application programs and acts as an interface between apps and computer hardware.
What are the objectives of an OS?
Efficiency, convenience and the ability to evolve.
What are the services of an OS?
Program development and execution, access to input and output devices, controlled access to files and system access.
What are file systems?
Resource abstractions of secondary storage in structured, shareable and long-term forms.
What are file operations?
Create, delete, open, read, write and close.
What is Data Hierarchy?
Volume -> Files -> Records -> Fields -> Characters
What is a Partition?
A logical division that divides a physical disk into two or more logical disks.
What does RAID stand for?
Redundant Array of Independent Disks
What does RAID do?
Allows multiple disks to form one partition
What are Disk Quotas?
A limit set by a system admin that restricts aspects of file system usage on operating systems.
What is a Permission?
A file restriction on the type of actions allowed for users.
What are the File User Types?
User, group and other.
What is a user?
The creator of the file
What is a group?
Delegated ownership; multiple users having shared permissions of a file.
What is other?
Additional users who interact with the files.
What is File System Integrity?
The prevention of corrupted sections, faulty hardware, bad configurations and malware that cause inconsistency over time.
What does FSCK stand for?
File System Consistency Check
What is a link?
A connection from a file or direction in one location that can be accessed from another location.
What is a soft link?
Files that point to a location of a file or directory in the system.
What is a Hard Link?
A replica of the original file it is pointing to.
