C String Test - 3 - Sanfoundry

1. Use_______to determine the null-terminated message string that corresponds to the error code errcode.

strerror()

strxfrm()

memset()

strstr()

2. What will be the output of the following C code?

void *memset(void *c, int c, size-t n) 
unsigned char ch = c;
unsigned char *su;
for (su = s; 0 < n; ++su, --n)
<br>
*su = ch;
<br>

store c throughout signed char s[n]

find first occurrence of c in s[n]

store c throughout unsigned char s[n]

find last occurrence of c in s[n]

3. This function offers the quickest way to determine whether two character sequences of the same known length match character for the character up to and including any null character in both.

memcmp()

strcmp()

no such function

strncmp()

4. What will be the output of the following C code?

char str1[15];
char str2[15];
int mat;
strcpy(str1, "abcdef");
strcpy(str2, "ABCDEF");
mat= strncmp(str1, str2, 4);
if(mat< 0)
printf("str1 is not greater than str2");
else if(mat> 0)
printf("str2 is is not greater than str1");
else
printf("both are equal");

str1 is not greater than str2

error in given code

str2 is not greater than str1

both are equal

5. 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);

There is error in the given code

find last occurrence of c in char s[ ].

find first occurrence of c in char s[ ].

find the current location of c in char s[ ].

6. 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);

The substring is:world

The substring is:Helloworld

The substring is:Hello

error in the code

7. What will be returned in the following C code?

size- t strlen(const char *s)
const char *sc;
for(sc = s; *sc!= ' \ O ' ; ++sc)
return(sc - s) ;

doesn't return any value

number of characters equal in sc

displays string s

length of string s

8. What will the given C code do?

int memcmp(const void *str1, const void *str2, size_t n)

compares the first n bytes of str1 and str2

copies the first n bytes of str1 to str2

copies the first n bytes of str2 to str1

invalid function

9. void *memcpy(void *dest, const void *src, size_t n) What does the following code do?

transform n character from dest to src

transform n character from src to dest

copies n characters from src to dest

copies n character from dest to src

10. The function strsp() is the complement of strcspn().

true

false