Network Security and Systems Software Part II Flashcards
List the 5 things that an operating system does
- provides a user interface
- memory management
- peripheral management
- file management
- User management
What is:
a) a user interface
b) WIMP
a) the way user interact with computer hardware
b) Windows, Icons, Menus and Pointers
what is a command line interface
A interface with no mouse or menus, just a text screen in which the user types in a command
What is a multi tasking computer?
A computer that is capable of switching rapidly between several tasks
What does the memory manager do when you start up a program
allocates it adequate blocks if free space in main memory
List 3 examples of peripherals
- keyboard
- mouse
- printer
What would the peripheral management do if a user requested to print
The function would control the sending of the data to be printed from memory to the device
what is a data buffer?
an area of RAM controlled by the operating system or the peripheral management system
what does user management enable?
a network administrator to allocate accounts and set access rights for the users
List 3 things file management systems can do
- enable a user to create save and modify files
- enables users to restore deleted files
- enable a user to search for a particular file
How does a hard disk become “fragmented”?
as files move, delete and change size, lots of small gaps appear in the hard disk. When files are written to the disk, the OS splits them into smaller blocks to fill up the gaps
Why is fragmentation bad for the computer?
Because it makes reading and writing files slower.
What does defragmentation software do?
defragmentation software reorganises the hard drive to put fragmented files back together. It also moves files to collect all files together.
