What is true about the following statement? out.open("values.dat", ios::app);
A) If the file already exists, its contents are preserved and all output is written to the end of the file.
B) If the file exists, it should be replaced with a new copy of values.dat
C) If the file exists, it can be opened but not modified
D) None of these

Question

Quizplus · Accepted Answer

The ios::app flag specifies that output operations should be performed at the end of the file, rather than overwriting any existing content. Therefore, if the file "values.dat" already exists, its contents will be preserved and all output will be written to the end of the file. Option B is incorrect, as the file is not replaced with a new copy, and option C is incorrect, as the file can be opened and modified with the ios::app flag.

What Is True About the Following Statement? Out