String Operations Quiz Online Practice Test

1. What will the output be for the following C program?
#include <stdio.h>
#include <string.h>
int main()
{
char *str = "hello, world";
char *str1 = "hello, world";
if (strcmp(str, str1))
printf("equal");
else
printf("unequal");
}

2. What will the following C code produce as its output?
#include <stdio.h>
int main()
{
char *str = "hello, world";
char str1[15] = "hello wo 9";
strcpy(str, str1);
printf("%s", str1);
}

3. What will be the result of the following C code execution?
#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));
}

4. In the following C code, what will be the result displayed on the screen?
#include <stdio.h>
int main()
{
char *str = "hello, world\n";
printf("%d", strlen(str));
}

5. What output will the following C code produce?
#include <stdio.h>
int main()
{
char str[11] = "hello";
char *str1 = "world";
strcat(str, str1);
printf("%s %d", str, str[10]);
}

6. The strcat() function appends a null character at the end:

7. What will the following C code output when executed?
#include <stdio.h>
int main()
{
char str[10] = "hello";
char *str1 = "world";
strncat(str, str1, 9);
printf("%s", str);
}

8. Which return types are utilized in string operations?

9. String operations like strcat(s, t), strcmp(s, t), strcpy(s, t), and strlen(s) primarily depend on:

10. Which predefined function is used to obtain a pointer to the last occurrence of a character within a string?

11. Which of the following functions performs a case-insensitive comparison of two strings?

12. What value will the variable var hold after executing the following C statement?
var = strcmp("Hello", "World");

13. What output will the following C program produce?
#include <stdio.h>
int main()
{
char str[10] = "hello";
char *p = strrchr(str, 'l');
printf("%c\n", *(++p));
}