Attack on IT people-----Computer Fundamentals 1

The composition and operation of a computer

1. The hard drive is loaded into memory and the CPU goes to read the instructions.

The data on the hard drive is static and the power is not affected. Like the songs and movies downloaded to the hard drive;

The data in memory is dynamic data, the power is not lost, such as the game is running, software.

2. The stage of computer development

(1) Machine language (0101001)---> assembly language (MOV,AX,BX)-----> Advanced Language (XX.C)

(2) The process of high-level or assembly language to machine language is called "compiling"

(3) Advanced languages-compile-----> assembly language----LINK RECOMPILE------> machine Language <---identify---computer

3. The high-level language does not need to manipulate the hardware, the operation speed is slow, occupies the place to be larger. It is compiled into a assembler, and then compiled to execute.

At the end of the first compilation, there will be a lot of intermediate code, fragment code. The purpose of the link is to combine all the first compilation code together for a second compilation. The CPU executes a second compilation to form the machine code. Machine code is redundant and occupies a large amount of memory relative to assembly language to machine languages. (It can be understood that the first person will send a message to the second person, the second person says a lot of useless words and a little useful to the third person).

Attack on IT people-----Computer Fundamentals 1