$1)$Consider the code snippet below.

int $ch$;

ch $=100$;

int$*$ ptr $=$ &ch;

Which of the following statements represents a legal way of obtaining the value

that ptr points to$?$

a ptr

b $*$ptr

c &ptr

d $*($&ptr$)$

$2)$To receive command line arguments at run$-$time, which of the following options

represents the correct way to define the main function?

a int main$($int$*$ argc, char argv$)$

b int main$($int argc$[],$ char$*$ argv$)$

c int main$($int argc, char argv$[])$

d int main$($int argc, char$*$ argv$[])$

$3)$What is the purpose of a main $()$ program accepting command line arguments?

a So the program can be run from a batch file without user input

b To supply values that vary at run time

c So the program can know the name under which it was invoked

d All of these

$4)$Considering that you want to open a binary file for reading and writing, which of the

following commands should you use?

a strm$.$open$($filename$,$ ios::in $|$ ios::out$)$;

b strm$.$open$($filenameios::binary$)$;

c strm$.$open$($filename$)$;

d strm$.$open$($filename$,$ ios::in $|$ ios::out $|$ ios::binary$)$;