Behavioral Design Patterns in C++ - Sensor - I

The video tutorial explains different methods for observers to acquire data, focusing on the observer pattern. It uses a temperature sensor example to illustrate how notifications are sent to various devices when temperature changes occur. The tutorial covers implementing the observer pattern, simulating sensor changes, and generating expected outputs. It concludes with a discussion on class diagrams and the push model, highlighting the flexibility of using push, pull, or a combination of both models depending on data requirements.

Which method involves sending the data itself with the notification?

• Delayed notification

• Empty notification

• Hint notification

• Data notification

What is the role of the database in the temperature sensor example?

• To send notifications

• To log the temperature changes

• To display the temperature

• To control the sensor

What is the primary function of the observer interface in the temperature sensor example?

• To notify observers of temperature changes

• To display temperature readings

• To change the temperature

• To store temperature data

In the push model, how is data sent to observers?

• Observers request data from the subject

• Data is sent as part of the notification

• Observers pull data when needed

• Data is sent only on request

Which model allows observers to request data from the subject?

• Direct model

• Push model

• Pull model

• Hybrid model