Question

Pick the incorrect statement about inline functions in C++?

(a) They reduce function call overheads

(b) These functions are inserted/substituted at the point of call

(c) Saves overhead of a return call from a function

(d) They are generally very large and complicated function

I have been asked this question in a national level competition.

This key question is from Classes in portion Source Files, Classes and Operator Overloading in C++ of C++

Answer 1

Correct answer is (d) They are generally very large and complicated function

Easy explanation - Inline are functions that are expanded when it is called. The whole code of the inline function gets inserted/substituted at the point of call. In this, they help in reducing the function call overheads. Also they save overhead of a return call from a function. Inline functions are generally kept small.