Advanced Python Assessment

What is the purpose of the __init__ method in a Python class?

• To initialize instance variables when an object is created
• To define class methods
• To create static methods
• To handle exceptions

Answer explanation

__init__ is the constructor method that initializes instance variables when an object is created.

Which of the following demonstrates proper inheritance syntax in Python?

• class Child(Parent):
• class Child extends Parent:
• class Child inherits Parent:
• class Child -> Parent:

Answer explanation

Python uses class Child(Parent): syntax for inheritance.

What will this code output?

• 10
• 20
• Error
• None

Answer explanation

The child class B overrides the class variable x, so obj.x returns 20.

Which method is automatically called when an object is about to be destroyed?

• __del__
• __destroy__
• __remove__
• __cleanup__

Answer explanation

__del__ is the destructor method called when an object is about to be destroyed.

What does super() do in Python inheritance?

• Creates a new superclass
• Calls methods from the parent class
• Prevents inheritance
• Defines abstract methods

Answer explanation

super() allows you to call methods from the parent class in the child class.

Which of these is a private attribute in Python?

• _variable
• __variable
• private_variable
• variable_

Answer explanation

Double underscore prefix (__variable) makes an attribute private through name mangling.

What is method overriding in Python?

• Creating multiple methods with same name
• Redefining a parent class method in child class
• Calling parent methods
• Creating static methods

Answer explanation

Method overriding is redefining a parent class method in the child class with the same name.

What does the @property decorator do?

• Creates a static method
• Creates a class method
• Allows method to be accessed like an attribute
• Handles exceptions

Answer explanation

@property decorator allows a method to be accessed like an attribute, enabling getter functionality.

Which is true about Python's multiple inheritance?

• Not supported
• Uses Method Resolution Order (MRO)
• Only allows 2 parent classes
• Requires special syntax

Answer explanation

Python supports multiple inheritance and uses Method Resolution Order (MRO) to resolve method calls.

What will len('Hello'.__class__.__name__) return?

• 5
• 3
• 8
• Error

Answer explanation

'Hello'.__class__.__name__ returns 'str', which has length 3.