The project team at University of Kentucky is moving forward with the new Student Grading System. The information system will have three external entities, with the following data flows: Entity Data flow from the Entity Data flow to the Entity Student Tasks Submission Graded Tasks Student Records System Online attendance Final Grade Instructor Grading Parameters Grade Report Moreover, the respective information system will have four subsystems: Establish Gradebook, Assign Final Grade, Grade Student Work Produce Grade Report, and a data store called Gradebook. The data flows are as follows: Data Flow From To Class Roster Student Records System Entity Establish Gradebook Process Final Grade Assign Final Grade Process Student Records System Entity Final Grade Assign Final Grade Process Gradebook Data Store Grading Details Gradebook Data Store Assign Final Grade Process Submitted Work Student Entity Grade Student Work Process Graded Work Grade Student Work Process Student Entity Student Grade Grade Student Work Process Gradebook Data Store Class Gradebook Establish Gradebook Process Gradebook Data Store Grading Parameters Instructor Entity Establish Gradebook Process Class Detail Gradebook Data Store Produce Grade Report Process Grade Report Produce Grade Report Process Instructor Entity Draw a context diagram for the new Student Grading System. Draw a diagram 0 DFD that shows the four subsystems, the data store and the data flows. Explain the relationship between a context diagram and diagram 0 level DFD, and which symbol is not used in a context diagram?

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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The project team at University of Kentucky is moving forward with the new Student Grading System. The information system will have three external entities, with the following data flows:

Entity	Data flow from the Entity	Data flow to the Entity
Student	Tasks Submission	Graded Tasks
Student Records System	Online attendance	Final Grade
Instructor	Grading Parameters	Grade Report

Moreover, the respective information system will have four subsystems:

Establish Gradebook,
Assign Final Grade,
Grade Student Work
Produce Grade Report, and a data store called Gradebook.

The data flows are as follows:

Data Flow	From	To
Class Roster	Student Records System Entity	Establish Gradebook Process
Final Grade	Assign Final Grade Process	Student Records System Entity
Final Grade	Assign Final Grade Process	Gradebook Data Store
Grading Details	Gradebook Data Store	Assign Final Grade Process
Submitted Work	Student Entity	Grade Student Work Process
Graded Work	Grade Student Work Process	Student Entity
Student Grade	Grade Student Work Process	Gradebook Data Store
Class Gradebook	Establish Gradebook Process	Gradebook Data Store
Grading Parameters	Instructor Entity	Establish Gradebook Process
Class Detail	Gradebook Data Store	Produce Grade Report Process
Grade Report	Produce Grade Report Process	Instructor Entity

Draw a context diagram for the new Student Grading System.
Draw a diagram 0 DFD that shows the four subsystems, the data store and the data flows.
Explain the relationship between a context diagram and diagram 0 level DFD, and which symbol is not used in a context diagram?

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