Design Patterns Questions

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Coding Principles

Design Patterns

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Question 1

What is a key difference between a deep copy and a shallow copy in the context of the Prototype Pattern?

A deep copy is faster to execute than a shallow copy.
A shallow copy duplicates references, while a deep copy creates new instances for nested objects.
A deep copy is only applicable to immutable objects.
A shallow copy is preferred when you need to maintain object immutability.

Explanation:

This difference is crucial in Prototype. Deep copies prevent unintended side effects by ensuring that modifications on cloned objects don't impact the original prototypes or their nested members.

Question 2

Which principle of object-oriented design does the Iterator Pattern promote by decoupling the traversal mechanism from the aggregate object?

Single Responsibility Principle
Open/Closed Principle
Liskov Substitution Principle
Dependency Inversion Principle

Explanation:

The Iterator Pattern aligns with the Open/Closed Principle because it allows for the introduction of new iteration algorithms or behaviors without modifying the existing aggregate class, promoting extensibility.