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Fundamentals of Computer Architecture

  • Our computer always responds to electricity
  • We choose binary number system (our power button)
    • Of/On (2 states)
    • 0: bit
    • 1: bit
    • Combination of 8 bits: byte 
      • ex. Megabyte
      • Byte: Unit of memory
  • Every symbol on the keyboard: character
    •  A; a to Z; z; all numbers...etc.
    • Each character is represented by a combination of bits (1 byte)
      • ex. 01000100
        • Based on code, alphabet shows up
  • Compiler
    • Translates the entire source code into binary
    • Takes in code
    • Points out errors
    • When it is correct, it converts the source code into machine language/binary code/binary language/object code
  •  Interpreter
    •  Translates line by line
      • Easier to find mistake in some situations
    • (Has same features as compiler)
  • Source Code (Java, C++) ---> Compiler/Interpreter ---> Object Code (binary: 01001111) 
    • "My source code is not compiling/interpreting"
  •  ______________________________________________________________
  • Systems programs that helps us to work with all of the resources of the machine: operating systems (ex. ios, windows) 
  • Application Program: ex. banking software works only in a bank: purpose that only works in a certain environment

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