Which of the following access flags, when used by itself, causes a file's contents to be deleted if the file already exists?
A) ios::app
B) ios::in
C) ios::out
D) Any of these
E) None of these

Question

Quizplus · Accepted Answer

The ios::out flag, when used by itself, will cause the file to be truncated (all contents are deleted) if the file already exists. The ios::app flag will append to the end of the file without deleting any existing content. The ios::in flag is used for reading from a file and does not affect whether the file's contents will be deleted. Therefore, the correct choice is C.

Which of the Following Access Flags, When Used by Itself