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Which of the following is the default mode of the opening using the fstream class?

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Which of the following is the default mode of the opening using the fstream class?

(a) ios::in

(b) ios::out

(c) ios::in|ios::out

(d) ios::trunc

This question was posed to me during an online interview.

The origin of the question is File Handling topic in chapter Strings, Streams & Numerics in C++ of C++

1 Answer

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Best answer
The correct choice is (c) ios::in|ios::out

For explanation: By default, the file is opened in ios::in|ios::out mode if the file object we are using is of fstream class.

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