Arrays and Strings MCQs

No library function will store a zero in errno.

The . . . . . . . . function tests for any hexadecimal-digit character.

What does the following C code do?

int iscntrl( int c);

Which of the given function is used to return a pointer to the located character?

What will the following C code do?

char * strrchr(const char *s, int c )
char ch = c;
char *sc;
for(sc = NULL; ; ++s)
if(*s == ch)
SC = 9;
i f (*s =='\O' )
return (( char *) s);

Which function returns true only for the characters defined as lowercase letters?

The . . . . . . . . function returns the number of characters that are present before the terminating null character.

The . . . . . . . . function appends not more than n characters.

What will be the output of the following C code?

const char str1[10]="Helloworld";
const char str2[10] = "world";
char *mat;
mat = strstr(str1, str2);
printf("The substring is:%s\n", mat);