Monitor resolution is measured in dots, if a lot of points, then the quality of the image on the screen above

Date: 2015-10-07; view: 491.

Optical media are usually written and read with a laser, a bit of data is written to a much smaller area on the optical platter (disc) than the area that is required to record a bit on a conventional magnetic disk. The possibility of a read/write head crash is extremely remote because the optical disc read/write head does not come as close to the platter as the magnetic disk read/write head

Data expands to fill the space available.

User expect to pay for a computer today that is twice as powerful as the computer that is now 18 months old approximately the same amount of money paid for the old computer.

Processing power (speed) doubles every 12-18 months. Storage capacity of RAM doubles every 12-18 months.

Number of transistors on a microchip doubles every 18 months.

b. List two extrapolations of Moore's Law that are discussed in the course materials.

c. How can Moore's Law and the extrapolations from Moore's Law assist a consumer in purchasing a computer?

d. Define Parkinson's Law of Data.

e. Using Parkinson's Law, what projection can be made regarding memory and hard disk usage?

f. How can Parkinson's Law assist a consumer in purchasing software or components for a computer?

1. Optical Media

a. List two advantages of optical media over magnetic media.

b. Fill in the following chart. The types of media to choose from are CD-R, CD-RW, CD-ROM, and DVD-ROM.

c.

d. Consider that optical media is read by a laser. How does the laser discern and transfer data from the optical media to the system?

e. Consider that a DVD and a CD are the same size. List two reasons a DVD holds more information than a CD.

1. Picture Quality

a. Explain resolution, with respect to a monitor.

b. List two typical monitor resolutions.

800*600, 1024*768

c. Explain color depth, with respect to a monitor.