Functions – Multiple Choice Questions (MCQs)

1. 1. What is a function in C?

   • A. A variable type
   • B. A block of code that performs a specific task
   • C. A loop structure
   • D. A data structure

2. 2. What is function definition in C?

   • A. Specifying the function's return type and name
   • B. Calling the function
   • C. Providing the actual code that the function executes
   • D. Declaring the function

3. 3. What is function call in C?

   • A. Defining the function's parameters
   • B. Specifying the return type
   • C. Executing the function
   • D. Declaring the function

4. 4. Which keyword is used to return a value from a function in C?

   • A. exit
   • B. void
   • C. return
   • D. break

5. 5. What is the return type of a function that does not return any value?

   • A. int
   • B. char
   • C. float
   • D. void

6. 6. What are function parameters (arguments)?

   • A. Variables declared inside the function
   • B. Values passed to the function when it is called
   • C. The return value of the function
   • D. Keywords used in the function definition

7. 7. What is the scope of a local variable declared inside a function?

   • A. Throughout the program
   • B. Only within the main function
   • C. Only within the function where it is declared
   • D. In all header files

8. 8. What is a global variable in C?

   • A. A variable declared inside a function
   • B. A variable passed as an argument to a function
   • C. A variable declared outside any function
   • D. A variable with limited scope

9. 9. What is the lifetime of a local variable in C?

   • A. Throughout the program execution
   • B. Only during the function call in which it is declared
   • C. Until the program terminates
   • D. It depends on where it is used

10. 10. What is the purpose of function prototypes in C?

    • A. To define the function body
    • B. To call the function
    • C. To declare the function before its definition
    • D. To include header files

11. 11. Which of the following is a valid function declaration in C?

    • A. void myFunction();
    • B. myFunction void;
    • C. function myFunction;
    • D. void function myFunction;

12. 12. What is recursion in C?

    • A. A function that calls itself
    • B. A function that returns multiple values
    • C. A function with no parameters
    • D. A function defined inside another function