What is difference between Strong Typing and Weak Typing ? Which one is prepared ?Why?

1. Strong type is checking the types of variables as soon as possible, usually at compile Time.
2.  While weak typing is delaying checking the types of the system as late as possible usually to runtime.
3.  Which is preferred depends on what you want  for scripts and quick stuff you. Usually want weak typing. 
4. Because you want to write as much as less code as possible. In big programs , strong typing can reduce errors at compile Time.