2.4 boolean logic, programming languages and IDEs

2.4 boolean logic, programming languages and IDEs

1. Assembler- assembles assembly language into machine code. it translates the whole code before excecution.

2. Compiler translates source code from a high level language to object code then machine code ready to be processed by the CPU.

   • The whole program is translated into machine code before it is run.

3. Compiler advantages: no need for translation software at run-time, speed of execution is faster because code is usually optimised.

   • Disadvantages: you cannot compile the program if there are syntax errors anywhere in it (tricky to debug). if you change anything you need to recompile the code.

4. Interpreter: translates source code from high level language into machine code ready to be processed by the CPU.

5. 1st generation and 2nd generation (low level languages)

   • 3rd and 4th generation(high level language)
     • known as declarative language, facts and rules are stated,e.g. SQL

6. IDE,(INTEGRATED DEVELOPMENT ENVIRONMENTS),Debugging tools, run time environment, Usabillity functions

7. machine code is machine specific

   • uses binary notation

8. assembly language uses mnemonics.