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What is the main purpose of an abstract base class in Python?

easy🧠 Conceptual Q11 of Q15
Python - Polymorphism and Dynamic Behavior
What is the main purpose of an abstract base class in Python?
ATo store data without any methods
BTo create objects directly from the base class
CTo automatically run code without subclassing
DTo define methods that must be implemented by subclasses
Step-by-Step Solution
Solution:

  1. Step 1: Understand abstract base class role

    An abstract base class sets a template for other classes by defining methods that subclasses must implement.

  2. Step 2: Analyze options

    Only 'To define methods that must be implemented by subclasses' correctly states this purpose. The other options describe incorrect uses.

  3. Final Answer:

    To define methods that must be implemented by subclasses -> Option D

  4. Quick Check:

    Abstract base class = method template [OK]
Quick Trick: Abstract base classes require method implementation [OK]
Common Mistakes:
MISTAKES
  • Thinking abstract classes can be instantiated
  • Confusing abstract classes with regular classes
  • Believing abstract classes store data only

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