Quiz: Polymorphism

5 questionsNo time limitPass: 60%+10 XP on first pass

One interface, many forms. Method overloading and overriding, dynamic dispatch, duck typing in Python, operator overloading, and why polymorphism makes code easy to extend.

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Question 1
Method overriding is an example of:
Compile-time polymorphismRuntime polymorphismEncapsulationComposition
Question 2
Two methods in the same class named add(int, int) and add(double, double) show:
OverloadingOverridingInheritanceAbstraction

Question 3

What does this print?

class A:
    def show(self): return "A"
class B(A):
    def show(self): return "B"
items = [A(), B(), A()]
print("".join(x.show() for x in items))

AAAABABBBAB

Question 4
"Duck typing" in Python means:
Every class must inherit from DuckAn object can be used if it has the needed methods, regardless of its classTypes are checked at compile timeOnly built-in types can be used
Question 5
Which method lets a + b work for your own Python class?
plusaddsumconcat