Which of the following function is used to find the first occurrence of a given

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

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1) What will be the output of the program ?

 #include<stdio.h>
 int main()
 {
     printf(2+"C Programming MCQ on Study 2 Online\n");
     return 0;
 }

2) What will be the output of the program ?

 #include<stdio.h>
 #include<string.h>
 int main()
 {
     char str[] = "Study 2 Online\0 C Language MCQ\0";
     printf("%s\n", str);
     return 0;
 }

3) What will be the output of the program ?

  #include<stdio.h>
  int main()
 {
     printf("Study 2 Online", " C Language MCQ\n");
     return 0;
 }

4) Which of the following function sets first n characters of a string to a given character?

5) What is the output of this C code?

#include <stdio.h>
     #include <string.h>
     int main()
     {
         char *str = "hello, world";
         char str1[9];
         strncpy(str1, str, 9);
         printf("%s %d", str1, strlen(str1));
     }