Which of the following statements opens a file named info.txt for both input and output?
A) dataFile.open("info.txt", ios::in && ios::out);
B) dataFile.open("info.txt", ios::in, ios::out);
C) dataFile.open("info.txt", input || output);
D) dataFile.open("info.txt", ios::in | ios::out);
E) None of these

Question

Quizplus · Accepted Answer

Option D uses the bitwise OR operator to combine the flags for input and output, which is the correct way to specify opening a file for both input and output using the open() function in C++. Option A uses the logical AND operator, which is incorrect for combining the flags. Option B separates the flags with a comma, which is also incorrect. Option C uses the logical OR operator within the argument list, which is not a valid syntax for specifying file open flags.

Which of the Following Statements Opens a File Named Info