6.4 Draw diagrams showing a conceptual view and a process view of the architectures of the following systems:

Ans.

A ticket machine used by passengers at a railway stations.

A computer-controlled video conferencing system that allows video, audio, and computer data to be visible to several participants at the same time.

A robot floor-cleaner that is intended to clean relatively clear spaces such as corridors. The cleaner must be able to sense walls and other obstructions.

6.5 A software system will be built to allow drones to autonomously herd cattle in farms. These drones can be remotely controlled by human operators. Explain how multiple architectural patterns can fit together to help build this kind of system.

The model manages fundamental behaviors and data of the application. It can respond to requests for information, respond to instructions to change the state of its information, and even to notify observers in event-driven systems when information changes. This could be a database, or any number of data structures or storage systems. In short, it is the data and data-management of the application.
The view effectively provides the user interface element of the application. It'll render data from the model into a form that is suitable for the user interface.
The controller receives user input and makes calls to model objects and the view to perform appropriate actions.
All in all, these three components work together to create the three basic components of MVC.

6.6 Suggest an architecture for a system (such as iTunes) that is used to sell and distribute music on the internet. What architectural patterns is the basis for your proposed architecture?

Client server model is the appropriate architectural pattern for such kind of system. iTunes stores all the music they sell in a database where the client can search these tracks by artist name, genre, etc. all via web based interface. Also, tracks can be downloaded and paid accordingly. Then, the server manages the music ordering also via web based interface.

6.7 An information system is to be developed to maintain information about assets owned by a utility company such as buildings, vehicles, and equipment. It is intended that this will be updatable by staff working in the field using mobile device as new asset information becomes available. The company has several existing asset databases that should be integrated through this system. Design a layered architecture for this asset management system based on the generic information system architecture shown in figure 6.8

6.8 using the generic model of a language processing system presented here design the architecture of a system that accepts natural language commands and translates these into database queries in a language such as SQL.