Basic Computer Review

1. What is the programming language? 
   Communication medium between people and computers 
   
2. What is programming? 
   The human thinking logic written down by way of a computer can read 

3. Why programming? 
   Human liberation, let the computer you can go and work in accordance with the logic of the human mind 


a complete computer system includes the following three parts 
   1. Application 
   2. Operating System 
   3. computer hardware 

computer hardware five part 
   1. Controller 
   2. operation It is 
      the logic operation: True or false things 
      mathematical operations: addition, subtraction and other mathematical correlation 
   controller + = operator central processing unit (CPU) 
   3. memory 
      memory: (only the high and low frequency electrical signal 010101010 in binary) based on the electrical operating 
         advantages: access speed 
         disadvantage: loss power data immediately 
      external memory :( hard, u disk, tape) 
         advantages: to permanently store data 
         disadvantages: in the memory access speed slower than 
   a keyboard, mouse, scanner: an input device 4. 
   The output equipment: a display, a printer, a sound 
   ps: 
      the input device may also be referred to as input 
      output device may also be referred to ouput 
      memory: IO device
Three core components 
   1.CPU 
   2. Memory 
   3. hard- 

cpu 
   1.X86 architecture 
   2.32, 64-bit 
      cpu is downward compatible 
   3.cpu works: go to get the user instruction memory >>> resolve themselves translated into the corresponding >>> operation to perform the operation 
   
memory 
   registers: cou next action is about to use a relatively small capacity of data 
   cache: storage is often necessary to use a relatively small capacity of data 
   memory: memory is your main 
   disk: 
      Machinery a hard disk (hard disk is read by the rotary head in the data above) 
      SSD 
   tape: are inexpensive, used for data backup server 
   
   
operating system 
   complex hardware manipulation package into ugly quick and easy interface 
   to coordinate, manage, schedule various computer hardware 

Double- a software icon 
   (tell the operating system to help you to operate the hardware) 
   1. the software corresponding to the data from the hard disk into memory 
   to read the data 2.cpu software corresponding to the memory 
   3 up to the user the feeling of this software 


files the concept of 
   operations document was in fact the operating system to provide you with a simple interface to operate the hard drive