Question

What is Relaxed Layered Style?

(a) Each layer can be constrained to use only the layer directly below it

(b) Sometimes this constraint is relaxed slightly to allow each layer to use all the layers below it

(c) All of the mentioned

(d) None of the mentioned

I got this question in an interview.

I'm obligated to ask this question of Layered Architectures in portion Visibility, Accessibility and Information Hiding of Software Architecture

Answer 1

The correct option is (b) Sometimes this constraint is relaxed slightly to allow each layer to use all the layers below it

The explanation is: Each layer can be constrained to use only the layer directly below it—this is a Strict Layered style whereas Sometimes this constraint is relaxed slightly to allow each layer to use all the layers below it—this is a Relaxed Layered style.