IKM Object-Oriented Programming Principles 3

Question 1

What is polymorphism in OOP?

Accepted Answer

Different objects respond to the same method call differently

Answer

Polymorphism allows different classes to provide their own implementation of shared methods.

Question 2

What is the Single Responsibility Principle?

Accepted Answer

A class should have only one reason to change

Answer

SRP means each class should have only one job or responsibility.

Question 3

What is a design pattern?

Accepted Answer

Reusable solution template for common design problems

Answer

Design patterns are general, reusable solutions to commonly occurring problems.

Question 4

What is the Observer design pattern?

Accepted Answer

Subject notifies dependents of state changes

Answer

Observer defines a one-to-many dependency where state changes trigger notifications.

Question 5

What is the difference between shallow and deep copy?

Accepted Answer

Shallow copies references; deep copy recursively duplicates all nested objects

Answer

Shallow copy shares references to nested objects; deep copy creates independent copies at every level.

IKM - International Knowledge Measurement Practice Test