04 - Computer Systems Flashcards
define a computer system
a system which takes a set of digital inputs, processes them and creates an output
state three input devices
keyboard
barcode reader
mouse
explain the role of a program within a computer system
- provides the CPU with a set of instructions to perform a specific task
what is the role of a data bus?
carries the data around a computer system
what are embedded systems?
where a computer processor is integrated into a device for automatic control
what is a system?
any activity that involves input, processing and outputting data
what is a dedicated system? and give an example
- a computer system dedicated to one task
- controlling one robotic arm in a car factory
what is an embedded system? and give an example
- a dedicated system, park of a larger mechanical/ electrical system
- washing machine controller
what is a general purpose system? and give an example
- many different purposes
- a smartphone (play games, play music, email)
state examples of hardware
- mouse
- keyboard
- CPU
- printer
state examples of software
- operating systems
- applications
how do computer systems communicate with other computer systems?
using interfaces
what is a process used for?
where the data input is converted to a readable form (for the computer)
what is a software?
the program code which is executed on the CPU
what is the mnemonic for remembering the tasks of an operating system?
Small Mice Always Sing Dangerous Flies Underground
what are the tasks carried out by operating systems? (7)
scheduling memory management allocation of resources security management device drawers filing system user interface
