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13 Cards in this Set
- Front
- Back
Why choose one input device over another? What about output device
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It depends on what you are going to do play games, write a paper, or draw.
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What are the disadvantages of each type of computer?
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The usually depend on size of machine, memory capacity, speed, cost, portability, and security capabilities.
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What are the advantages and disavantagesd of each type of secondary storage?
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These are determined by memory, speed, cost, and portability.
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Compare the properties of RAM and ROM.
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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 |
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Explainm how a computer trasltes datat from electrical impulses to usable information.
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Input device to bits to binary code to CPU to bytes to usable information or calculation.
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bit
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each impulse in a series of electrical impulses that the input device sends the computer
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byte
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a group of 8 bits that the computer interprets as a character
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binary code
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a number system that has two numbers, 0 and 1, used to indicate whether an electrical impulse is off (0) or on(1).
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bandwidth
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the cumulativeamount of data that can be transported at one time
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cache
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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.
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Identify some ways in which the speed of data access can be increased.
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Speed can be increased with megahertz, increasing bus width, pipeling, RISC, and Caching
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Megahertz MHz
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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
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Pipelining
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allowing the computer to move on to the next part of the cycle before each phase is complete.
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