Q6 common mistakes in c
5 points
each of the following code samples below is...
Computers and Technology, 05.02.2020 12:56 leylaanddade
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
Answers: 2
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