Question

Draw a high-level system of how you would design a school's learning system, virtual learning environments. ( Students can take exam, submit assignment , email professor, study other course related material through this system).

Answer 1

Model	Description
Data Repository	Our model follows the Presentation Abstraction Control (PAC) architectural pattern. The data repository is not part of the application. the data repository PAC agent provides access to the data repository underlying the system. It implements functionality for reading and writing course data. It also implements all functions that operate on the course data such as algorithms for exam questions, report generation. All incoming service requests, events data are handled by receiveMsg. SendMsg is used to pack and deliver requests to other agents.
NetworkTraficManagement	Network traffic management agent provides interface to the network management system in the organization. It provides access to server like mail server, web servers
Error handler	Error handler PAC agent is an intermediate PAC agent. It handles the error and logging functionality of the application.
ViewCoordinator	It’s a mid level PAC agent that provides access to read only views
Spreasheet	provides interface to update the repository data
IdentiyCoordinator	This PAC agent manages identity access like log in. admin users can update the records like course materials. Application users like students can update the student specific data like assignments or answers in exam.
CourseMaterial	This is a bottom level PAC agent. Provides course view and tutorial materials to the user.
Reports	provides interface to generate reports.
Exams	Provides views to appear for exam based on the user course preferences
UserDashboard	User dashboard provides the logged in user to interact with the application such as subscribe to a course, appear exam, view reports, personal data.
Mail box	provides user mail box for interacting with the peers or professors.

The internal structure of a report agent is shown. A user asks the presentation component of the view coordinator agent to open a report card. The control of the view coordinator agent instantiates the desired report.

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Title Internal Structure of Pack Agent ViewCoordinator Report PAC Agent Control Presentation Abstraction interactionData presentation Data reportData sendMsg receiveMsg view print getReportData setReportData

emp School Lam System Network Trafic Management DataRepost Repository - netwondata - Course Data + Dove Man sevente + send Mod kevente + send Miso + Dove Me ErrorHandler Network Coordinator View Coordinator viewCourses Spreadsheet - Curse Data Identity Coordinator - Loginis er data - severds + + login display Emg0 + handle End kevente + send Miso - Boven + send Miso Teolveig + openView close View + send Miso Tove Vigo open dose ente ata * vente Dendego reveal Send Miso receivelse CourseMatria Mal Box Assignments Exams Reports User DashBoard - Course Data - exam Data assignment Data reportData - Verbata + mallis events + endig + receive Mon + view + open + close + 200 m + move Dinto + Open move + submit sevento nou ove sevento + sendo ove + open + Submit + move print close evente + send + Boelve updated delete out + send + ecelveli

sd ViewCoordinator ViewCoordinator Report Agent Abstraction Control Presentation reportData interaction Data presetation Data + getReportData() + setre portDate() «event + send Visg) + receive Msol) view) print) +