• Diff between Compiled Lang Vs Interpreted Lang Vs Declarative Lang?

complier lang

• Takes entire program as single input and converts it into object code which is stored in the file.
• Intermediate Object code is generated
• e.g: C,C++,java
• Compiled programs run faster because compilation is done before execution.
• Memory requirement is more due to the creation of object code.
• Error are displayed after the entire program is compiled
• Source code —Compiler —Machine Code —Output

Interperted lang

• Takes single instruction as single input and executes instructions.
• Intermediate Object code is NOT generated
• e.g: Perl, Python, Matlab
• Interpreted programs run slower because compilation and execution take place simultaneously.
• Memory requirement is less.
• Error are displayed for every single instruction.
• Source Code —Interpreter —Output

Declarative lang

It’s a method of programming based around describing what something should do or be instead of describing how it should work.

• ex:xhtml, html
• Its advantages include effective code, which can be applied by using ways, easy extension, high level of abstraction, etc.