Test: C String Operations - Class 6 MCQ

The given code char *strchr(ch, c) return pointer to first occurrence of c in ch or NULL if not present.

The strcat() function is used for concatenating two strings, appends a copy of the string.
char *strcat(char *s1,const char *s2);

The strlen() function is used to return the number of characters that are present before the terminating null character.size-t strlen(const char *s);The length of the string pointed to by s is computed by strlen().

In the C library function int memcmp(const void *str1, const void *str2, size_t n)) is used to compare the first n bytes of memory area str1 and memory area str2.

int strncmp(ch, s, n) is used to compare at most n characters of string ch to string s; return <0 if ch0 of ch >s.

The strcmp() function compares the string s1 to the string s2.
int strcmp(const char *s1,const char *s2);

In the C library function memcpy() is used to copy n characters from memory area src to memory area dest.

The memcpy() function copies n characters from the object pointed to by s2 into the object pointed to by s1. If copying takes place between objects that overlap, the behavior is undefined.

This is the unsigned integral type and is the result of the sizeof keyword.

The strchr() function is used to return a pointer to the located character if character does not occur then a null pointer is returned.

The function size_t strcspn(c, s) is used to return length of prefix of c consisting of characters not in s.

The prototype of strcoll() function is int strcoll(const char *s1,const char *s2).

The strstr() function is used to return a pointer to the located string, or if string is not found a null pointer is returned.

Use strerror (errcode) to determine the null-terminated message string that corresponds to the error code errcode.

There are two groups of string functions declared under the header <string.h>. The first have names beginning with str and second have names beginning with mem.