what does compiler,linker and interpreter do

We all have heard about compiler,linker and interpreter in programming language.How its work can be differenciated.Which one works more fast.

 

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Compiler compiles the whole program at a time where interpreter one line of a code at a time...so compiler works more faster that interpreter... on the other hand linker is different from compiler and interpreter..linker links the library files with the object file to form .exe or executable file...