What is the issue with this code? C char str[5]; strcpy(str, "hello");

"hello" has 6 characters (including null terminator), but str can only hold 5

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Strings in C

This quiz will test you understanding of the concept of Strings in C programing.

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Question 1

What is a string in C?

special data type
single character
array of characters terminated by a null character
pointer to an integer

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Question 2

Which header file is required to use string functions like strlen() and strcpy()?

stdlib.h
string.h
stdio.h
conio.h

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Question 3

What is the output?

#include <stdio.h> #include <string.h> int main() { printf("%ld", strlen("Hello")); return 0; }

4
5
6
Compilation Error

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Question 4

Which of the following correctly declares a string in C?

char name = "John";
string name = "John";
char name[] = "John";
char name ={ 'J', 'o', 'h', 'n', '\0' };

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Question 5

What does the '\0' character indicate in a C string?

Space
End of file
End of string
Null string

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Question 6

What is the difference between strcpy() and strncpy()?

strncpy() does not require null termination
strncpy() copies only one character
strncpy() allows specifying the number of characters to copy
No difference

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Question 7

Which of the following will correctly compare two strings in C?

str1 == str2
strcmp(str1, str2) == 0
str1 = str2
str1.equals(str2)

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Question 8

What is the issue with this code?

char str[5]; strcpy(str, "hello");

No Issue
strcpy is deprecated
"hello" has 6 characters (including null terminator), but str can only hold 5
str must be initialized

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Question 9

Which function is used to concatenate two strings in C?

concat()
append()
strcat()
join()

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Question 10

What does the function strchr(str, 'a') return?

NULL
Address of first occurrence of 'a'
Address of last occurrence of 'a'
Boolean value

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