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13 Cards in this Set

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  • Back
Why choose one input device over another? What about output device
It depends on what you are going to do play games, write a paper, or draw.
What are the disadvantages of each type of computer?
The usually depend on size of machine, memory capacity, speed, cost, portability, and security capabilities.
What are the advantages and disavantagesd of each type of secondary storage?
These are determined by memory, speed, cost, and portability.
Compare the properties of RAM and ROM.
ROM is read only memory, it cannot be changed, it is a permamnent part of the computer brain, and it instructs the computer itself.
RAM random access memory is not permanent,is lost when the computer shuts off, is generally used as a part of application programs
Explainm how a computer trasltes datat from electrical impulses to usable information.
Input device to bits to binary code to CPU to bytes to usable information or calculation.
bit
each impulse in a series of electrical impulses that the input device sends the computer
byte
a group of 8 bits that the computer interprets as a character
binary code
a number system that has two numbers, 0 and 1, used to indicate whether an electrical impulse is off (0) or on(1).
bandwidth
the cumulativeamount of data that can be transported at one time
cache
a memory block designed to keep data and instructions close to the CPU so that the computer can retrieve that information fast without going into other storage areas.
Identify some ways in which the speed of data access can be increased.
Speed can be increased with megahertz, increasing bus width, pipeling, RISC, and Caching
Megahertz MHz
units in whic the speed of a microprocessor is usually measured; millions of machine cycles per second for example a 100MHZ computer can do 100 million machine cycles per second
Pipelining
allowing the computer to move on to the next part of the cycle before each phase is complete.