Q6 common mistakes in c

5 points

each of the following code samples below is making a common mistake in c. from the options, select the error type that best categorizes the mistake.

you can assume all the code has the necessary #include macros. also you should assume that the system is 32-bit.

1) #define password "correct horse battery staple"
char *check_permissions (char *user_guess) {
if (user_guess = password) {
return "access granted";
}
return "access denied";
}
probable segfault

double free

incorrect use of free

logic error

memory leak

no error

2) #define password "correct horse battery staple"
char *check_permissions (char *user_guess) {
if (user_guess == password) {
return "access granted";
}
return "access denied";
}
probable segfault

double free

incorrect use of free

logic error

memory leak

no error

3) int main () {
char *x = malloc(0x * sizeof(char));
x[0] = '! ';
}
probable segfault

double free

incorrect use of free

logic error

memory leak

no error

4) int foo () {
int *x = malloc(20);
x[0] = x[1] = 1;
x[2] = x[0] + x[1];
x[3] = 99;
return x[3];
}
probable segfault

double free

incorrect use of free

logic error

memory leak

no error

5) int main () {
char *x = "patrick";
printf("%s", x);
free(x); // tidy up
}
probable segfault

double free

incorrect use of free

logic error

memory leak

no error