05.03 Abstraction Generalisation Inheritance Polymorphism - Quiz

Check your understanding

1. What is the primary purpose of abstraction in object-oriented programming?

   • To make code run faster
   • To hide complexity and expose only essential features { data-correct }
   • To create more classes
   • To use more memory

2. Which concept involves identifying common characteristics across different objects?

   • Abstraction
   • Generalisation { data-correct }
   • Inheritance
   • Polymorphism

3. Look at this code. What concept does it demonstrate?

   class Animal:
       def make_sound(self):
           pass
   
   class Dog(Animal):
       def make_sound(self):
           return "Woof!"
   

   • Abstraction
   • Generalisation
   • Inheritance { data-correct }
   • Polymorphism

4. What is polymorphism in object-oriented programming?

   • Creating multiple classes
   • Same interface, different behavior { data-correct }
   • Using multiple inheritance
   • Having many attributes

5. Which Python concept allows objects to be used polymorphically without formal inheritance?

   • Type checking
   • Duck typing { data-correct }
   • Method overriding
   • Class inheritance

6. In this code, what concept allows the play_instruments function to work with different instrument types?

   def play_instruments(instruments):
       for instrument in instruments:
           print(instrument.play())
   

   • Abstraction
   • Generalisation
   • Inheritance
   • Polymorphism { data-correct }

7. What does the super() function do in inheritance?

   • Creates a new class
   • Calls methods from the parent class { data-correct }
   • Deletes the parent class
   • Makes the class abstract

8. Which statement about inheritance is correct?

   • Child classes cannot override parent methods
   • Child classes inherit all attributes and methods from parents { data-correct }
   • Parent classes inherit from child classes
   • Inheritance makes code slower

9. What makes this an example of good abstraction?

   file_manager.save_file("data.txt", content)
   

   • It uses a short method name
   • It hides the complex file operations behind a simple interface { data-correct }
   • It only works with text files
   • It’s written in Python

10. Which scenario best demonstrates the need for generalisation?

    • Creating a single class for one specific object
    • Finding common features among cars, trucks, and motorcycles to create a Vehicle class { data-correct }
    • Writing separate code for each different situation
    • Using only concrete classes