A+ Certification

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  1. Define memory
    Any device that holds ones and zeros that the CPU accesses.
  2. What is another name for an If statement
    Branch
  3. Why does the CPU need a way to address each line of memory?
    So other programs will know where to find the data
  4. What does each of the following equal

    bit
    nibble
    byte
    word
    double word
    paragraph or quad word
    Any individual 1 or 0 = a bit


    4 bits = a nibble


    8 bits = a byte


    16 bits = a word


    32 bits = a double word


    64 bits = a paragraph or quad word
  5. How does Ram transfer data?
    In byte size chunks of 8 bits
  6. Can CPUs access any row of data faster that any other
    No, all rows are equally accessable to RAM
  7. What does DRAM stand for?
    Dynamic Random Access Memory
  8. What is DRAM used for?
    Main system memory
  9. What 2 things does DRAM need?
    Constant electrical charge and periodic refresh of the circuits
  10. What is the MCC?
    memory controller chip
  11. What does the MCC do?
    The MCC contains special circuitry that enables it to grab the contents of any single line of RAM and place that data or command on the external data bus. This in turn enables the CPU to act on that code.
  12. How does the CPU communicate to the MCC
    Through the address bus
  13. How does the address bus work?
    By turning the address bus wires on and off in different patterns the CPU tells the MCC which line of RAM it wants at any given moment.
  14. How many bytes in the following
    1 kilo
    1 kilobyte
    1 mega
    1 megabyte
    1 giga
    1 gigabyte
    1 tera
    1 terabyte
    1 kilo = 210 = 1,024 (abbreviated as K)

    • 1 kilobyte = 1,024 bytes (abbreviated as KB)
    • 1 mega = 220 = 1,048,576 (abbreviated as M)
    • 1 megabyte = 1,048,576 bytes (abbreviated as MB)
    • 1 giga = 230 = 1,073,741,824 (abbreviated as G)
    • 1 gigabyte = 1,073,741,824 bytes (abbreviated as GB)
    • 1 tera = 240 = 1,099,511,627,776 (abbreviated as T)
    • 1 terabyte = 1,099,511,627,776 bytes (abbreviated as TB)
    • 1 kilo is not equal to 1,000 (one thousand)
    • 1 mega is not equal to 1,000,000 (one million)
    • 1 giga is not equal to 1,000,000,000 (one billion)
    • 1 tera is not equal to 1,000,000,000,000 (one trillion)

Card Set Information

Author:
bljewhite
ID:
29338
Filename:
A+ Certification
Updated:
2010-08-09 00:09:21
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Description:
Chapter 4
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