What is a concrete Observer?

The ConcreteObservers are classes that contain information specific to the current instance . The update function is called by the subject’s notify() operation. The observers update independently based on their current state. The Observer is the parent class of the concrete observers.

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Is MVC an Observer pattern?

The Observer Pattern is the foundation of the Model View Controller (MVC) pattern , in which a view is updated automatically whenever the model’s state changes. In the . NET Framework, delegates with events are an implementation of the Observer pattern.

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What is observable interface?

An observable object can have one or more observers. An observer may be any object that implements interface Observer . After an observable instance changes, an application calling the Observable ‘s notifyObservers method causes all of its observers to be notified of the change by a call to their update method.

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