What problem does the MVP pattern solve and what difficulties may arise without its use?

The MVP (Model-View-Presenter) pattern addresses responsibility separation in applications, especially in UI layer. It separates presentation logic (View) from business logic (Presenter) and data (Model). This simplifies testing, maintenance, and code development.

Without MVP, the code often becomes tangled, with View containing both logic and display, making debugging and component reuse difficult. Also, without clear separation, writing unit tests is harder because logic is tightly coupled with UI.

Example:

• Model — data and business logic
• View — user interface
• Presenter — intermediary that fetches data from Model and updates View

Thus, MVP helps make code cleaner, modular, and testable.