Functions

Sample questions

Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.

Section A · multiple choice

1. 1.

   The values written in a function call are called:

   1. return values
   2. local variables
   3. parameters
   4. arguments

   Answer

   (d) arguments

2. 2.

   What does this print? def area(l, b=5):     return l * b + 9 print(area(8), area(8, 9))

   1. 49 54
   2. 17 81
   3. 50 81
   4. 49 81

   Answer

   (d) 49 81

   b takes its default value only when it is not passed

3. 3.

   What does this print? def total(p, q=2, r=5):     return p + q * r print(total(1, 9))

   1. 46
   2. 15
   3. 11
   4. 64

   Answer

   (a) 46

   match keyword arguments by name, the rest by position; missing ones take their defaults

Section B · short answer

1. 4.

   What is the difference between a parameter and an argument?

   Answer

   A parameter is the name in the function header; an argument is the value passed in the function call.

2. 5.

   What does this print? Give (a) the first value (b) the second. def area(l, b=9):     return l * b + 9 print(area(6), area(6, 8))

   Answer

   (a) 63; (b) 57

   b takes its default value only when it is not passed

Section C · long answer

1. 6.

   Explain with an example how default and keyword arguments work, and the rules for using them.

   Answer

   def f(a, b=2, c=3): return a + b * c. f(1) = 7, f(1, 4) = 13, f(1, c=5) = 11, f(c=5, a=1) = 11. Default parameters must come after the others in the header; in a call, keyword arguments come after positional ones and no parameter may get two values.

Fresh sheets for your child

In the app, every Functions sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.

Coming soon for Android and iPhone.

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