Is MVC a design pattern or an architectural pattern?
MVC which stands for Model-View-Controller describes a software pattern that you can use in interactive computer systems. To understand if it is a design pattern or an architectural pattern, let's look at what these two are:
Architectural pattern: Concerned with the subsystems of an application with their relationships and collaborations with each other.
Design pattern: Concerned with the (further small) components of a subsystem with their relationships and collaborations with each other.