Opening a file in 'a+ 'mode

Question

If a file is opened using the following command:

FILE *f1=fopen(\"test.dat\",\"a+\");

The man page reads:

a+

Answer 1

No.

There is just one pointer which initially is at the start of the file but when a write operation is attempted it is moved to the end of the file. You can reposition it using fseek or rewind anywhere in the file for reading, but writing operations will move it back to the end of file.