after write operation reading is possible without closing and re-opening
reading is possible
writing is possible
All of the above
is a function
gives the current file position indicator
can be used to find the size of a file
needs 3 arguments
makes the rewind function unnecessary
is meant for checking whether a given file exists or not
both needs 3 arguments and makes the rewind function unnecessary
a mode
w mode
w+ mode
a+mode
f1,f2,f3
f3,f2,f1
The order may vary from compiler to compiler
None of these