Which one of the following is termed as either input and output device?
Touch screen
CRT monitor
LCD
Plasma
Computers that use microprocessors are called:
Micro computer
Abacus
UNIVAC
ENIAC
Which of the following converts a pattern of printed bars into a number?
Camera
Scanner
Barcode reader
Printer
Which one is said to be an input device, largely used in super markets, commercial business fields etc?
OMR
Track ball
Which device is used for giving instructions and data to the computers?
Memory
Processing
Output
Input
The storage capacity of a CD ROM is :
450MB
550MB
650MB
850MB
Who invented the first mechanical computer?
Charles Babbage
John Napier
Univac
