IO device

Question 1

Monitors

Answer 1

Cathode-Ray Tube (CRT)

Flat- Panel Display

Liquid Crystal Display (LCD) Monitor

Light Emitting Diode (LED) Monitor
more lifelike and accurate

Organic Light Emitting Diode (OLED) Monitor
made up of some organic material

Question 2

Printers

Answer 2

Impact Printers and Non-impact printers

Question 3

Impact Printers

Answer 3

he impact printers print the characters by striking them on the ribbon which is then pressed on the paper

Dot-Matrix Printers, Line Printers, Daisy wheel printer, Drum printer, Chain printer, Band printer

Question 4

Non-Impact Printers

Answer 4

Non-impact printers print the characters on the paper without using ribbon. These printers print a complete page at a time, so they are also called as page printers

Question 5

Inkjet Printers

Answer 5

Inkjet printers work by spraying ink on a sheet of paper. The type of ink used in an inkjet printer is wet.

Question 6

Plotters

Answer 6

A plotter is an output device used to produce hard copies of large graphs and designs on paper, such as construction drawings, architectural plans, and business charts

Question 7

types of plotters.

Answer 7

Drum plotters and Flatbed plotters

Question 8

Drum plotter

Answer 8

It is a pen plotter that wraps the paper around a drum with a pin feed attachment.
The drum then rotates the paper as pens move across it and draw the image.
It is used to produce continuous output, such as plotting of earthquake activity
It is also known as Roller Plotter.

Question 9

Flatbed plotter

Answer 9

It plots on paper that is spread and fixed over a rectangular flatbed table.
It is used in the design of cars, ships, aircrafts, buildings, highways etc.
It is also known as Table Plotter.

Question 10

Dot-Matrix Printers

Answer 10

It prints characters as a combination of dots.
They have a matrix of pins on the print head of the printer which form the character.
They generally have 9-24 pins. Their speed is measured in cps (Character per second).

Impact Printers

Question 11

Line Printers

Answer 11

A line printer is an impact printer which can print one line of text at a time. It is also known as a bar printer

Impact Printers

Question 12

Laser Printers

Answer 12

A laser printer is a popular type of personal computer printer that uses a non-impact photocopier technology.
The type of ink used in a laser printer is dry.
It gives high-quality output.
The resolution of laser printers is measured in dpi (dots-per-inch).

Non-Impact Printers

Question 13

Solid Ink Printer

Answer 13

It is a type of colour printer. It works by melting the solid ink that applies the images to the paper. It is non-toxic and convenient to handle

Question 14

LED Printer

Answer 14

his type of printer uses a light emitting diode instead of a laser. It starts by creating a line-by-line image of the page.

Question 15

7 structure of OS

Answer 15

Kernel
Memory Management
Process Management
Device Management
File Management
Storage Management
User Interface

Question 16

OMR

Answer 16

Optical Mark Recognition

Question 17

OCR

Answer 17

Optical Character Recognition

It is a technology that recognizes text within a digital image. It converts the document to an editable text file.

Question 18

Digitizer

Answer 18

It allows users to draw and manipulate graphics on the screen.
It is also known as a graphics tablet.
These kinds of tablets typically designed for CAD/CAM professionals.

Question 19

MICR

Answer 19

Magnetic Ink Character Recognition

It is a character recognition system that uses special ink and characters. It is used to verify the legitimacy or originality of paper documents, especially cheques. Information can be encoded in the magnetic characters. It provides a secure, high-speed method of scanning and processing information

Question 20

Modifier Keys

Answer 20

special key (key combination) that temporarily modifies the normal action of another key when pressed together. Shift, Alt, Ctrl, Fn are modifier keys.

Question 21

Toggle Keys

Answer 21

It is used to change the input mode of a group of keys on a keyboard. Caps Lock, Num Lock, Scroll Lock are toggle keys.

Question 22

Computer Peripheral

Answer 22

A peripheral device links to a computer system to enhance the functionality of the computer. It is not part of the core computer architecture. Input devices, output devices, and storage devices are the types of peripheral devices.

Question 23

Data Transmission Modes

Answer 23

Data Transmission modes refer to the way of transferring the information or data between two connected devices. Three types of transmission modes are:
✓ Simplex Mode: Data can be transferred in only one direction, Keyboard

✓ Half Duplex Mode: Data can be transferred in both directions, but not at the same time. Walkie-talkie.

✓ Full Duplex Mode: data can be transferred in both direction on the same transmission path. Two lines are used for sending and receiving the data.
Telephone network