Python Design Patterns Quiz

When is __new__ executed?

• Before __init__

• After __init__

• Instead of __init__

• During class destruction

What best describes a metaclass?

• A superclass for all exceptions

• A class that creates other classes

• A decorated method

• An abstract base class

What does the Singleton pattern ensure?

• Only one instance exists

• Multiple interchangeable algorithms

• One-to-many notifications

• Dynamic behavior addition

Which pattern delegates object creation to subclasses?

• Observer

• Factory Method

• Decorator

• Strategy

In the Observer pattern, who receives updates?

• The main subject

• Registered observers

• Factory objects

• Decorator classes

What does the Decorator pattern do?

• Adds responsibilities dynamically

• Ensures single instance

• Creates object families

• Encapsulates algorithms

Which pattern selects algorithms at runtime?

• Singleton

• Strategy

• Observer

• Factory

What is the purpose of getter methods?

• To modify private attributes directly

• To return attribute values safely

• To initialize class instances

• To delete object properties

Which magic method provides an "official" string representation?

• __str__

• __repr__

• __print__

• __info__

What happens if you don't handle an exception?

• Program continues silently

• Program terminates with error

• Exception is logged automatically

• Default values are substituted