4.1.1.11 Parameters and returning values Quiz: AQA Computer Science, Unit 1

The 20 questions

1. What is the term for a value passed into a subroutine when it is called?

   • Global variable
   • Return value
   • Local variable
   • Parameter

2. What component of a subroutine defines its parameters and return type?

   • Interface
   • Recursion base
   • Body
   • Stack frame

3. A function is defined as calculateArea(width, height) and returns width times height. What are width and height?

   • Constants
   • Parameters
   • Global variables only
   • Return addresses

4. Where can a value returned by a function be directly used?

   • In a header
   • In a comment
   • In a declaration
   • In an expression

5. A function called getMax takes two integers and returns the larger. It is called with getMax(7, 12). What is returned?

   • 19
   • 12
   • 7
   • 5

6. A subroutine is called with the arguments (3, 4) and it adds them and returns the result. What is the returned value?

   • 12
   • 34
   • 7
   • 1

7. What term describes the actual value passed into a subroutine during a call?

   • Identifier
   • Argument
   • Parameter
   • Local variable

8. What key programming benefit does using parameters in subroutines provide?

   • Automatic debugging
   • Faster execution
   • Code reusability
   • Reduced stack size

9. What happens to a subroutine call if its returned value is not assigned?

   • Runtime crash
   • Compilation error
   • Subroutine skipped
   • Subroutine still runs

10. A procedure has three parameters. How many values must the caller supply if all three are needed?

    • 3
    • 1
    • 0
    • 2

11. What is a key advantage of passing parameters into subroutines rather than using global variables?

    • Automatic iteration
    • Improved modularity
    • Reduced memory
    • Faster execution

12. A function returns the average of three values passed in as parameters. Which expression returns the correct average for 4, 6 and 8?

    • (4 + 6 + 8) DIV 2
    • 4 + 6 + 8 / 3
    • (4 * 6 * 8) / 3
    • (4 + 6 + 8) / 3

13. What type of error occurs when passing a string argument to a float parameter?

    • Syntax error
    • Logic error
    • Stack overflow
    • Type mismatch

14. What does defining a subroutine interface establish prior to implementation?

    • Inputs and outputs
    • Execution speed
    • Memory address
    • Variable lifetimes

15. A function returns the square of a parameter. What is returned when the function is called with 5?

    • 5
    • 15
    • 25
    • 10

16. A function returns the number of characters in a string passed as a parameter. The string "CPU" is passed. What is returned?

    • 0
    • 2
    • 4
    • 3

17. What error occurs if an invalid array index parameter is passed into a subroutine?

    • Out of bounds
    • Type mismatch
    • Syntax error
    • Stack overflow

18. How many parameters and return values are needed for a function calculating petrol cost?

    • One parameter, two returns
    • Two parameters, one return
    • Zero parameters, zero returns
    • Two parameters, two returns

19. A function is called as average(10, 20). If the function returns the mean of its two parameters, what is returned?

    • 15
    • 20
    • 10
    • 30

20. A subroutine takes a parameter and returns the parameter multiplied by 10. The caller passes 4 and stores the result. What is stored?

    • 14
    • 4
    • 400
    • 40

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