Question

What is the user-defined header file extension in c++?

(a) cpp

(b) h

(c) hf

(d) hg

I have been asked this question in an interview for internship.

Enquiry is from Header Files Usage in chapter Source Files, Classes and Operator Overloading in C++ of C++

Answer 1

Right choice is (b) h

Easiest explanation - .h extensions are used for user defined header files. To include a user defined header file one should use #include”name.h” i.e. enclosed within double quotes.