Arrays and Strings - C Programming MCQ Questions and Answers

The printf("%d", sizeof("Hello")) statement in C is used to determine the size (in bytes) of the string literal "Hello" including the null terminator. In C, string literals are automatically null-terminated.

The string "Hello" consists of 5 characters: 'H', 'e', 'l', 'l', 'o', and it also includes a null terminator ('\0') at the end to mark the end of the string.

So, the total size of the string literal "Hello" is 6 bytes (5 characters + 1 null terminator).

Therefore, the output of printf("%d", sizeof("Hello")) will be Option B: 6 because it's the size of the string in bytes, including the null terminator.

In C, sizeof(int) returns the number of bytes used to store an integer data type.

On most modern systems (especially 32-bit and 64-bit architectures), an int typically occupies 4 bytes.

Therefore, the expression sizeof(int) generally evaluates to 4.

However, it is important to note that the exact size can vary depending on the compiler and system architecture, but 4 bytes is the most commonly expected answer in standard environments.