ExamAdept

How can you achieve method overriding in Python using the @property decorator?

A:

By directly using the @property decorator on the overridden method

B:

By using the @override decorator

C:

By using the @implements decorator

D:

Method overriding is not possible using @property

Answer: A

Method overriding in Python can be achieved by using the @property decorator on the method in the superclass and implementing it in the subclass.

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In Python, what is the purpose of the @classmethod decorator?

A:

To create a new instance of the class

B:

To define a method that can be accessed like an attribute

C:

To access class attributes directly

D:

To define a method that takes the class as its first argument

Answer: D

The @classmethod decorator is used to define a method that takes the class as its first argument, conventionally named cls.

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Consider the following code:

class Shape:
    def __init__(self, color):
        self.color = color

class Circle(Shape):
    def __init__(self, radius, color):
        super().__init__(color)
        self.radius = radius

What is the purpose of using super().__init__(color) in the Circle class?

A:

To call the constructor of the Shape class

B:

To create a new instance of the Circle class

C:

To access superclass attributes directly

D:

To define a new constructor for the Circle class

Answer: A

super().__init__(color) is used to call the constructor of the superclass Shape and initialize the color attribute.

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What is the purpose of the __init_subclass__() method?

A:

To define class attributes

B:

To create a new instance of the class

C:

To customize the initialization of subclasses

D:

To access superclass attributes directly

Answer: C

The __init_subclass__() method is used to customize the initialization of subclasses in Python.

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Consider the following code:

class A:
    def method(self):
        print("Method in class A")

class B(A):
    def method(self):
        print("Method in class B")

class C(B):
    pass

obj = C()
obj.method()

What will be the output of the obj.method() call?

A:

Method in class A

B:

Method in class B

C:

The code will result in an error

D:

Method in class C

Answer: B

The method() is overridden in class B, and since class C inherits from class B, calling obj.method() will print "Method in class B".

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Questions for: Inheritance