FUNDAMENTALS OF A COMPUTER SYSTEM Flashcards
What are features of a computer?
speed
accuracy
efficiency
versality
storing and retreving
how can you classify computers?
according to physical size
according to technology
what are super computers?
*used for scientific and engineering funtion
*used in institutes like NAZA , large scale businesses and military purposes
*can solve complex mathematical problems
*Have a high computing power
*large in size , expensive and rare
what are mainframe computers?
*no.of users get connected to one comouter using no.of terminals sharing, saving and retreving data
what are uses of main frame computers?
*have relatively less physical size , computing power and are less expensive than super computers
*used in large scale buissness and with super computer transactions are done using internet
what are uses of mini computers?
*lower in physical size ,less powerful and less expensive
*known as common computers
*use in medium scale such as banks
what is known as mini computers?
few users get connected to the central computer through a few terminals share data and information
what is known as micro computers?
small computer meant for personal use
what are uses of mini computers?
*consists of small memory capacity , smaller in size less speedy and expensive
*laptop , hand held , smart phones are examples
how can computers classify according to technology?
analog
hybrid
digital
what is analog computers?
*these computers use analog signals such as environmental parameters
*speedometers, road lamps with sensors and meterological machines are examples
what is digital computers?
the computers with digital signals
what is hybrid computers?
*combination of analog and hybrid computers
*examples-ECG machine
what is the function of a computer system?
*data and instructions are fed to the computer via input device
*first go to the primary memory then those are sent to the CPU for processing.
*the processed data stored in primary memory as information is sent to output device
the data and information which are to be stored sent to the secondary storage device.
*the stored information can be sent to an output device through primary memory
*control units sends the control signals to all the devices attached to the computer system
*computer memory contains data and instructions
*when a computer programme works the relevant data and instructions are sent to cpu
what is a computer?
a computer is an electronic device which accepts or collects data and process them according to given instructions and produces desired output
give some examples for input devices?
mouse
keyboard
omr
ocr
micr
barcode reader
touch pad
joystick
webcam
cctv
light pen
microphone
what are examples for both input and output devices?
touch screen
photocopy machine
smart board
digital camera
atm
what are methods of producing the processed information by a computer system?
hard copies
soft copies
sound
what is known as soft copies and give some examples?
the output on the screen is known as soft copies
ex-monitor/screen,multimedia projector,lcd,led,crt
what are hard copies?
hard copies are tangible computer outputs.
ex-printers
what are two types of printers?
impact printers
non impact printers
examples for impact printers?
dot matrix
line
examples for non impact printers?
bubble /ink jet
laser
thermal
what is the brain of computer?
cpu
what is three main components of CPU
ALU
memory registers
CU
what are the units measured the computer speed?
megahertz and gigahertz
