Which of the following classes is a base class of the other three?
A) basic_ios
B) basic_istream
C) basic_ostream
D) basic_iostream

Question

Quizplus · Accepted Answer

basic_ios is the base class for the other classes mentioned: basic_istream, basic_ostream, and basic_iostream. These classes are part of the C++ Standard Library's input/output system, where basic_istream is for input streams, basic_ostream is for output streams, and basic_iostream is for input/output streams. All of these derive from basic_ios, which provides common functionality for input and output operations.

Which of the Following Classes Is a Base Class of the Other