COMPUTER SCIENCE EXAM QUESTIONS AND ANSWERS

1. Explain USB Port (Universal Serial Bus).
Answer:
a. Give the specifications of Laser printer.
 b. It is a plug and play interface between computers and add on devices.
2. It is a high speed serial bus
Answer:
a. Buffer size varies from 4MB to 32 MB
 b. Speed varies from 4 PPM to 24 PPM.
 c. Resolution varies from 600 to 1200 dots per inch.
 d. Can print color images.

3. Give the specifications of inkjet printer.
Answer:
a. Speed varies from 1PPM to 12 PPM
 b. Resolution is around 300 dots per inch.
 c. Buffer size varies from 1 MB to 4 MB

4. Expand DDR RAM.
Answer: Double Data Rate Random Access Memory.

5. Give the specifications of dot matrix printer.
Answer:
a. Speed varies from 30 to 300 characters per second.
 b. Buffer size varies from 1K to 64 K.
 c. Print head normally has 9 pins to 24 pins.