Operating System Flashcards
What is a utility?
Programs used by the OS which allow the user to manage the computer
Name 8 popular utility softwares
- Deleting Data
- Disk Defragmentation
- User Accounts and Security
- Anti-Virus Software
- Software Updates
- System Cleanup
- Encryption/ Decryption
- Formatting
Purpose of BACKUP?
Allows the user to restore the system to a previous state which is saved as a backup
This is only usually used if a system malfunctions
Purpose of DISK CLEANER?
When a file is deleted, the address to the location on the disk is removed
Purpose of DISK DEFRAGMENTATION?
Rearranges the information on a disk so that files appear in continuous sequences of clusters
This will improve file access times
Purpose of FORMATTING?
Storage drives need to be formatted to be compatible with an OS
Purpose of USER ACCOUNTS?
Allow the user to allocate specific users and protects personal files and programs from unauthorised access
Purpose of ENCRYPTION?
Can encrypt data when it is stored, or whenever it is transmitted over a network
Purpose of ANTI-VIRUS SOFTWARE?
Detects and blocks viruses
Purpose of FIREWALLS?
Can be used to filter between trusted and untrusted networks and prevent programs from communicating through the use of ports
Name 5 common Operating Systems
- Windows
- iOS
- Linux
- Android
- Mac OS X
What are the functions of the operating system?
Memory management User interface --> Windows Icons Menus Pointers Multi-tasking Peripheral management Security
What are the 3 user interfaces?
CLI (Command Line Interface)
GUI (Graphical User Interface)
Menu Interface
What is CLI and pros and cons?
Used to implement the text-based interface
Pros:
- Faster
- More controllable
Cons:
- Hard to remember all the commands
What is GUI and pros and cons?
Graphical icons and visual indicators
Pros:
- Quick to navigate
- Easy to use
Cons:
- Can be slow
