What exactly is occuring in memory if I run the following programs? Will they crash or will they execute successfully?

A.

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

{

char myArr[40];

strcpy(buffer,argv[1]);

}

B.

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

{

char * myChar =Testing 123;

char myArray[10];

for ( int i =0; i< 2000; i++)

{

myArray[i]= $;

}

char test = myChar[0];

}