Question

What is the use of clog?

(a) Standard logging stream

(b) Error stream

(c) Input stream

(d) output stream

The question was posed to me during an interview for a job.

I want to ask this question from Class Hierarchies Introduction in section Class Hierarchies, Library & Containers of C++

Answer 1

Correct option is (a) Standard logging stream

Easy explanation - clog is an object of class ostream that represents the standard logging stream. It is associated with the cstdio stream stderr, like cerr.