POC Object-Oriented Programming in Python 2

Question 1

What is the purpose of the `__str__` method in a Python class?

Accepted Answer

To return a human-readable string representation of an object

Answer

`__str__` returns a user-friendly string representation used by `print()` and `str()` functions.

Question 2

Which keyword is used to inherit from a parent class in Python?

Accepted Answer

Parentheses with the parent class name in the class definition

Answer

Python uses parentheses in the class definition (e.g., `class Child(Parent):`) to indicate inheritance.

Question 3

What does `super().__init__()` do in a child class?

Accepted Answer

Calls the parent class's `__init__` method to initialize inherited attributes

Answer

`super().__init__()` invokes the parent class constructor so inherited attributes are properly set up.

Question 4

Which of the following best describes method overriding?

Accepted Answer

Defining a method with the same name in a child class to replace the parent's implementation

Answer

Method overriding allows a subclass to provide a specific implementation for a method already defined in its parent class.

Question 5

What will `isinstance(obj, MyClass)` return if `obj` is an instance of a subclass of `MyClass`?

Accepted Answer

True

Answer

`isinstance()` returns `True` for instances of the class and all its subclasses.

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