A file type is the standard used to and information in a computer. All file types have unique
that determine which program to use to open a particular file and to access its data.

Ibelieve its true but not sure hope this .

This is an opinion based question, someone on the internet can’t answer it for you. it’s not like a math problem that has the same solution, this comes from your brain and what you think.

Metaprogramming  is a programming technique in which computer programs have the ability to treat programs as their data. it means that a program can be designed to read, generate, analyse or transform other programs, and even modify itself while running. ps: you don't have any options there.