Command Line Arguments

What is the first argument in command line arguments?

Comment on the following pointer declaration?

int *ptr, p;

What does argc and argv indicate in command-line arguments?

What does the first parameter of the main function represent?

What will be the output of the following C code (if run with no options or arguments)?

#include 
    int main(int argc, char *argv[])
    {
        printf("%d\n", argc);
        return 0;
    }

Does there exist any way to make the command-line arguments available to other functions without passing them as arguments to the function?

Which character is used to separate different arguments?

What is the output of this C code?

#include 
    int *f();
    int main()
    {
        int *p = f();
        printf("%d\n", *p);
    }
    int *f()
    {
        int j = 10;
        return &j;
    }

What will be the output of the program (myprog.c) given below if it is executed from the command line?
cmd> myprog one two three

/* myprog.c */
#include
#include

int main(int argc, char **argv)
{
    printf("%s\n", *++argv);
    return 0;
}

What is the output of this C code?

#include 
    int main()
    {
        char *p = NULL;
        char *q = 0;
        if (p)
            printf(" p ");
        else
            printf("nullp");
        if (q)
            printf("q\n");
        else
            printf(" nullq\n");
    }