Input Output Devices - Computer Questions and Answers

Attempt Mode

Computer » Input Output Devices

In laser printer which type of laser is used?

A

Dye laser

B

Gas laser

C

Semiconductor laser

D

Excimer laser

Solution

 A laser printer is basically a photocopier. Charge is sprayed onto a semiconducting drum, and the semiconductor laser is used to selectively cause areas to conduct and thus lose their charge.

* The charge is then used to attract toner, which is then transferred to the paper. Finally, a fuser unit melts the toner onto the paper so it doesn't just blow away again.

* It doesn't take much light to activate the semiconductor. Lasers are used because they can be focused on a precise point, not for power.

Computer » Input Output Devices

Dot Matrix Printers when compared to Laser Printers are

A

Quieter

B

Faster

C

Less expensive

D

More expensive

Computer » Input Output Devices

Pick the odd one out :

A

Floppy Disk

B

ROM

C

DVD

D

Hard Disk

Computer » Input Output Devices

Which of the following is an impact printer ?

A

Inkjet printer

B

Bubble jet printer

C

Laser printer

D

Daisy wheel printer

Computer » Input Output Devices

The telephone line is connected through the on the computer ?

A

USB

B

Modem

C

Ethernet

D

PS2

Computer » Input Output Devices

Which printer cannot print more than one character at a time

A

Daisywheel

B

Laser

C

Dot matrix

D

Line

Computer » Input Output Devices

A is an input device which is used for converting pictures maps and drawings into digital form for storage in computers ?

A

OCR

B

OMR

C

MICR

D

digitizer

Computer » Input Output Devices

To read a CD-ROM disc you need a

A

laser beam

B

magnetic needle

C

sound card

D

graphics card

Computer » Input Output Devices

How much data does a standard floppy disk hold?

A

512KB

B

44MB

C

20 MB

D

1GB

Computer » Input Output Devices

What is the size of Floppy Diskette which is used normally ?

A

7/3”

B

5”

C

4”

D

3”

Computer » Input Output Devices

Which among the following is a distinctive feature by which a CD ROM drive is classified in a personal computer ?

A

Software bundle

B

Data transfer rate

C

Memory capacity

D

Storage period

Computer » Input Output Devices

What is Tele text ?

A

Flashing of telephone conversation on TV screen

B

Printing the text of the message on the telex machine.

C

Connecting the local telephone with outstation telephones without STD codes.

D

Flashing of the text of news and information on the TV screen

Computer » Input Output Devices

A compact disc (CD) is a data storage system of the type

A

magnetic

B

optical

C

electrical

D

electromechanical

Computer » Input Output Devices

What is click jacking ?

A

Malicious technique of tricking Web user into revealing confidential information

B

A device that sends and receives data in a bit second

C

A form of Computer Engineering

D

A digital process that is used to display an image on monitor