Is wordpress written in MVC pattern?

Is WordPress written in MVC architect?

How to understand a CMS is a MVC?

A CMS that written in MVC must have directories with named “Model”, “Controller”, “View”?

Sorry for my beginner question .

WordPress dosen’t follow MVC (Model-View-Controller) nor is written with OOP approach in mind. Anyway you can write your plugins with a MVC pattern or using OOP. One excelent tool to use MVC in WordPress is WP MVC