Functions – Multiple Choice Questions (MCQs)

1. 25. What is the default storage class for a function in C?

   • A. auto
   • B. static
   • C. extern
   • D. register

2. 26. Can a function return multiple values in C directly?

   • A. Yes
   • B. No
   • C. Using pointers or structures
   • D. Using global variables

3. 27. What is the purpose of the 'const' keyword in a function parameter?

   • A. To make the parameter read-only within the function
   • B. To make the parameter a constant value
   • C. To pass the parameter by reference
   • D. To indicate that the function does not modify the parameter

4. 28. What is the difference between standard library functions and user-defined functions?

   • A. Standard library functions are built-in
   • B. user-defined are created by the programmer
   • C. Standard library functions are faster
   • D. user-defined are slower

5. 29. What is the order of execution of functions in a C program?

   • A. Depends on the function definitions
   • B. From top to bottom
   • C. The order in which they are called
   • D. The main function is executed last

6. 30. Can the 'main' function be called recursively?

   • A. Yes
   • B. No
   • C. Only under certain conditions
   • D. It depends on the compiler

7. 31. What is the return type of the 'main' function in standard C?

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

8. 32. What are command-line arguments passed to the 'main' function?

   • A. Arguments passed to the program when it is executed from the command line
   • B. Variables declared inside the 'main' function
   • C. Return values from other functions
   • D. Header files included in the program

9. 33. What are 'argc' and 'argv' in the 'main' function?

   • A. argc' is the argument count
   • B. argv' is the argument vector
   • C. argc' is the argument vector
   • D. argv' is the argument count

10. 34. What does 'argc' represent?

    • A. The number of characters in the first argument
    • B. The number of arguments passed to the program
    • C. The name of the program
    • D. The return value of the 'main' function

11. 35. What does 'argv' represent?

    • A. An array of character pointers
    • B. where each pointer points to a command-line argument
    • C. A single string containing all command-line arguments
    • D. The return address of the 'main' function

12. 36. What is a function signature?

    • A. The function's return type
    • B. name
    • C. and parameters
    • D. The function's body