Code Twisters Round One Batch -1

What is the output of the following code?

• 5

• 10

• 0

• Compilation Error

Which of the following is not a valid storage class in C?

• static

• extern

• mutable

• register

What does malloc return when memory allocation fails?

• -1

• 0

• NULL

• Garbage Value

What is the size of an int data type on a 32-bit system?

• 2 bytes

• 4 bytes

• 8 bytes

• Machine dependent

What is the result of the following expression?

• 1

• 3

• -1

• Compilation error

Which of the following is true for a function returning a pointer?

• The function returns the address of a variable.

• The function returns a copy of a pointer.

• The function must return a pointer to a global variable.

• None of the above.

What does the following code do?

• Sets the value of ptr to 10

• Generates a runtime error

• Results in undefined behavior

• Compilation error

What is the default return type of a function in C if none is specified?

• void

• int

• float

• char

Which of the following correctly declares a function that takes a pointer to an int and returns void?

• void func(int*);

• void* func(int);

• void func(int);

• int* func(void);

Which of the following is the correct statement regarding dynamic memory allocation?

• malloc and calloc allocate memory but do not initialize it.

• malloc allocates memory but does not initialize it, while calloc allocates and initializes it.

• Both malloc and calloc allocate and initialize memory.

• calloc allocates memory but does not initialize it, while malloc allocates and initializes it.