Explore operator overloading in object-oriented programming languages. Provide examples of how it can be implemented and the potential benefits and drawbacks.

When applicable, object-oriented design should be used. When the situation calls for it, structured design is an acceptable option. Why does anything similar occur, etc.?

Is it possible to describe coupling and harmony in the context of object-oriented computer research and design?

How does polymorphism relate to method overriding, and why is it important in object-oriented design?

Explain how interfaces are used to achieve polymorphism in programming languages.

What is the significance of utilising access modifiers in object-oriented programming? What are the comparative benefits of this option in relation to other alternatives? Elucidate the rationales for utilising them in a specific context.

Object-oriented programming and design patterns have a link that needs explanation?