1.2.2 Applications Generation

White space and comments are removed. The keywords and identifiers are replaced with tokens and they are stored with each keyword in a symbol table

Abstract tree is produced, which is a representation of the source code in the form of a tree Errors generated if token break any rules of the language. Errors are reported as a list Error diagnostic is given

Abstract syntax tree is converted to produce object code which is the machine code before final step

Tweaks the code so it will run as quickly and use as little memory as possible. Redundant parts of the code are detected and removed.

Piece of software responsible for linking external modules and libraries within code

The loader retrieves the program when the program is run (files remain small and updates automatically)

Program provided by the OS. When a file is executed, the loader retrieves the library from given memory location

Precompiled programs that can be incorporated within other programs. They are ready to use and error-free so saving development time and testing modules. It can be reused in many programs.

Performs a specific task relating to the upkeep of the OS ie disk defragmentation

Program that converts high- level code into low level object code ready to be executed.

Translate high level code into machine code all at once.

Translate and execute code line by line. They stop to produce an error if a line contains an error.

Next level from machine code is platform specific as instructions used are independent on instruction set of processor.