Python Questions and Answers – Operator Overloading

This set of Python Questions and Answers focuses on “Operator Overloading”

1. Which function is called when the following Python code is executed?

f = foo()
format(f)

a) format()
b) __format__()
c) str()
d) __str__()
View Answer

2. Which of the following Python code will print True?

a = foo(2)
b = foo(3)
print(a < b)

a)

class foo:
    def __init__(self, x):
        self.x = x
    def __lt__(self, other):
        if self.x < other.x:
            return False
        else:
            return True

b)

class foo:
    def __init__(self, x):
        self.x = x
    def __less__(self, other):
        if self.x > other.x:
            return False
        else:
            return True

c)

class foo:
    def __init__(self, x):
        self.x = x
    def __lt__(self, other):
        if self.x < other.x:
            return True
        else:
            return False

d)

class foo:
    def __init__(self, x):
        self.x = x
    def __less__(self, other):
        if self.x < other.x:
            return False
        else:
            return True

3. Which function overloads the + operator?
a) __add__()
b) __plus__()
c) __sum__()
d) none of the mentioned
View Answer

4. Which operator is overloaded by __invert__()?
a) !
b) ~
c) ^
d) –
View Answer

5. Which function overloads the == operator?
a) __eq__()
b) __equ__()
c) __isequal__()
d) none of the mentioned
View Answer

6. Which operator is overloaded by __lg__()?
a) <
b) >
c) !=
d) none of the mentioned
View Answer

7. Which function overloads the >> operator?
a) __more__()
b) __gt__()
c) __ge__()
d) none of the mentioned
View Answer

8. Let A and B be objects of class Foo. Which functions are called when print(A + B) is executed?
a) __add__(), __str__()
b) __str__(), __add__()
c) __sum__(), __str__()
d) __str__(), __sum__()
View Answer

9. Which operator is overloaded by the __or__() function?
a) ||
b) |
c) //
d) /
View Answer

10. Which function overloads the // operator?
a) __div__()
b) __ceildiv__()
c) __floordiv__()
d) __truediv__()
View Answer

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