Strings Interview Questions Mock Test

Question 1: String Representation

How are strings stored in C?

Question 2: String Initialization

Which of the following correctly declares and initializes a string?

Question 3: strlen() Function

If char str[] = "C Language";, what will strlen(str) return?

Question 4: puts() Function

What will this program print?

#include <stdio.h>

int main() {
    char str[] = "Hello";
    puts(str);
    return 0;
}

Question 5: strcat() Function

What will be printed?

#include <stdio.h>
#include <string.h>

int main() {
    char str1[20] = "Hi ";
    char str2[] = "C";
    strcat(str1, str2);
    printf("%s", str1);
    return 0;
}

Question 6: strcmp() Function

What will strcmp("apple", "apple") return?

Question 7: gets() Function

Why is gets() considered unsafe in C?

Question 8: strcpy() Function

What will be printed?

#include <stdio.h>
#include <string.h>

int main() {
    char str1[10];
    strcpy(str1, "Code");
    printf("%s", str1);
    return 0;
}

Question 9: String vs Character

Which of the following is a string constant in C?

Question 10: strchr() Function

Which standard library function is used to find the first occurrence of a character in a string?