Basic C Programming - String operator

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

• char str[] = "Hello, World!";

• string str = 'Hello, World!';

• char str = 'Hello, World!';

• int str = 'Hello, World!';

How do you represent a string literal in C?

• Hey, Universe!

• Goodbye, Earth!

• "Hello, World!"

• Hello, Mars!

What is the null character in C strings?

• \NULL

• \x00

• \0

• \n

How do you access individual characters in a C string?

• By using array notation with the index of the character.

• By converting the string to an integer

• By using a pointer to the character

• By calling a built-in function

What is the difference between char array and string in C?

• A char array can only store single characters, while a string can store multiple characters

• A char array is mutable, while a string is immutable

• A char array is a data type in C, while a string is not

• In C, a char array is a collection of characters stored in contiguous memory locations, while a string is a sequence of characters stored as a null-terminated array of characters.

Explain the concept of null-terminated strings in C.

• Null-terminated strings in C are character arrays that end with a null character '\0', which signifies the end of the string.

• Null-terminated strings in C are character arrays that end with a null character '\0', which signifies the end of the string.

• Null-terminated strings in C are character arrays that end with a null character '\t', which signifies the end of the string.

• Null-terminated strings in C are character arrays that end with a null character '\n', which signifies the end of the string.

How do you concatenate two strings in C?

• strconcat(string1, string2)

• string1 + string2

• concat(string1, string2)

• strcat(string1, string2)

What is the purpose of the strlen() function in C?

• To check if a number is prime in C

• To calculate the square root of a number in C

• To determine the length of a string in C

• To convert a string to uppercase in C

Explain the difference between strcpy() and strncpy() functions in C.

• strcpy() and strncpy() are interchangeable

• strcpy() copies the entire string without checking length, while strncpy() allows specifying the maximum number of characters to copy.

• strcpy() copies only a part of the string

• strncpy() does not copy the string at all

How do you compare two strings in C?

• str1.compare(str2)

• compare(str1, str2)

• str1 == str2

• strcmp(str1, str2)