Moving from object-oriented to functional programming is a paradigm shift for developers, but these key principles explain why it's worth the effort.

Explain and implement inheritance and associated mechanism to achieve polymorphism and code reuse. Identify and implement design principles and design patterns to achieve sound object-oriented design.

SOLID is an acronym that represents five design principles in object-oriented programming (OOP). These principles aim to make software systems more maintainable, flexible, and easily understood.