Database Management System

Database Management System 

Objectives

The objectives of this assignment are,

1.      Giving the idea of the most common tool used for designing database systems i.e. Data Flow Diagram. It is used to design systems graphically and expresses different details of system in different DFD levels.

2.      To become familiar with the flow of data between different processes and to hide complexities in any given system.

Assignment

Consider a scenario of an Educational and Recruitment Testing System (ERTS). We are going to automate the ERTS system so that there may be no chances of error and aim is to facilitate the applicant to fill the online application form with ease. To complete this system we will divide this whole project in small assignment chunks (probably 4) and will try to cover every phase of the database development life cycle from scratch to implementation (SQL Queries). Scenario of the ERTS system is given below.

Scenario

Introduction:

The Educational and Recruitment Testing System (ERTS) is an organization that conducts academic performance evaluation tests. It is an autonomous, testing organization, conducts tests for admissions, scholarships, and recruitment purposes. It is governed by a Management Committee (Admin). ERTS is a testing and assessment organization facilitating in producing educated and market competitive human resource.

The whole system can be divided into following five different modules:

1.      ERTS Tests and Products

2.      Applicant Registration

3.      Application processing by ERTS

4.      Test

5.      Result

Detail of each module is given below:

1.      ERTS Tests and Products:

The system will use modern technologies for developing tests, test conduction, e-marking and compilation of results.

ERTS is assumed to conduct tests for the following categories:

·         Academic Tests

·         Recruitment(employment) Tests

2.      Applicant Registration:

The applicants who are seeking for admission (college/university) or recruitments, which requires an ERTS Test for its eligibility criteria, will have to apply for ERTS Test.

The applicant will be either already registered or will a new applicant. Already registered applicants could be login to the system by entering their username and password and could apply for their interested test category. [s1] 

In case the applicant has not been registered yet, he will first register himself by filling and submitting the online application form available at ERTS website. After submitting the application form, the applicant will receive a confirmation message and the application will be stored in the ERTS database. After that the applicant will print the filled application along with a bank deposit slip, and will deposit the required amount in the mentioned branches of banks. He will post the application form along with the bank deposit slip on the mentioned address.

3.      Application processing by ERTS:

The applications received by ERTS will be processed according to required criteria and the eligible candidates will be issued a roll number slip. The accepted and rejected both applications will be stored in the ERTS database.

4.      Test:

On the mentioned test date the applicant appears in the test at allocated center.

The invigilator verifies the candidates via their original NIC and roll number slip. The invigilator starts distributing the question booklet and answer sheet according to the selected test category. The candidate attempts the test and returns both the answer sheet and question booklet to the respective invigilator.

5.      Result:

The invigilator will hand over both the answer sheet and question paper to the staff of Educational and Recruitment Testing System (ERTS). The staff will arrange the answer sheets in proper sequence by serial number. The staff starts marking of answer sheets through the scanned process of the system and the system will match the attempted questions with the stored question bank and will mark each question as correct or incorrect. The system will calculate the total marks and will store in the database. The system will declare the online result as well as dispatch the result card to successful candidates after approval from the management committee.

Task Description:

This Assignment is starting phase and in this assignment you will focus only on the tasks given below:

is all about system of our university.

Task-1:

Part1. You are required to identify all the processes in the system.   (5 Marks)

Part2. Find out all the external entities interacting with the system.  (5 Marks)

Task-2:

Create a Context level DFD of the given scenario:                            (10 Marks)

Important things to consider:

Ø  As happens in real world that everyone visualize a problem in different way so the solutions of all students should be according to their own thinking not taken from some source.

Ø  As this is preliminary phase of our system so it is recommended that you identify as much processes and their relationships as you can (some of them may be eliminated in coming assignments).

Good Luck