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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.