Which of the following function is used to find the first occurrence of a given string in another string? strrchr() strstr() strnset() strchr()

Which of the following function is used to find the first occurrence of a given string in another string?

Which method in StringBuffer is used to obtain the index within the sequence of the first occurrence of a specified character or substring?a)findFirst()b)indexOf()c)search()d)locate()

Write a function that locates a character in a string.Prototype: char *_strchr(char *s, char c);Returns a pointer to the first occurrence of the character c in the string s, or NULL if the character is not found

The library function used to find the last occurrence of a character in a string is

If str1="Programming Language"What does str1.find("m") return?Number of occurances of "m" in string str1.Index positions of "m" in the string str1.It returns the whole string str1 if it contains "m".It returns the index position of first occurance of "m" in the string str1.