What is the role of Model in the following Observer class diagram models Model View -models : Model +Attach() Detach() |+Notify() O- *Update() for all m in models m->Update() ConcreteModel ConcreteView state GetState() +SetState() view state 1-view: ConcreteView -Update() state = view->GetState() return state Select one: a. Abstract Observer b. Subject c. Concrete Observer

What is the role of Model in the following Observer class diagram models Model View -models : Model +Attach() Detach() |+Notify() O- *Update() for all m in models m->Update() ConcreteModel ConcreteView state GetState() +SetState() view state 1-view: ConcreteView -Update() state = view->GetState() return state Select one: a. Abstract Observer b. Subject c. Concrete Observer

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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