String in C MCQ (Multiple Choise Questions)

String in C MCQ 

Question 1: What is the correct way to declare a string in C?

 a) string str;

 b) char* str;

 c) str string; 

d) char str[100];

Answer 1: b) char* str;

Question 2: How do you initialize a string in C?

 a) string s = "Hello";

 b) char s[] = "Hello"; 

 c) s = "Hello"; 

 d) char* s = "Hello";

Answer 2: b) char s[] = "Hello";

Question 3: What is the function used to find the length of a string in C?

 a) len() 

 b) length()

 c) strlen() 

 d) strlength()

Answer 3: c) strlen()

Question 4: In C, how do you compare two strings? 

 a) compare(str1, str2);

 b) strcomp(str1, str2);  

 c) strcmp(str1, str2); 

 d) strcompare(str1, str2);

Answer 4: c) strcmp(str1, str2);

Question 5: What is the function used to concatenate two strings in C? 

 a) concat()

 b) strcat() 

 c) join() 

 d) strjoin()

Answer 5: b) strcat()

Question 6: How do you input a string from the user in C? 

 a) scanf("%s", str);

 b) gets(str);

 c) read(str); 

 d) input(str);

Answer 6: a) scanf("%s", str);

Question 7: Which header file is required for string functions in C?

 a) <stdlib.h>

 b) <math.h> 

 c) <string.h> 

 d) <stdio.h>

Answer 7: c) <string.h>

Question 8: What does the function strcpy() do in C? 

 a) Concatenates two strings 

 b) Compares two strings

 c) Copies one string to another 

 d) Finds the length of a string

Answer 8: c) Copies one string to another

Question 9: How do you convert a string to an integer in C?

 a) atoi() 

 b) strtoi()

 c) intToStr() 

 d) stringToNum()

Answer 9: a) atoi()

Question 10: What is the output of the following code snippet?

c
char str1[] = "Hello"; 
char str2[] = "World";
strcat(str1, str2);
printf("%s", str1);

a) Hello 

b) World 

c) HelloWorld 

d) Compiler Error

Answer 10: d) Compiler Error (Buffer Overflow - str1 is not large enough to hold the concatenated string)