Offline Examiner

1Offline Examiner

CONTENTS

1. INTRODUCTION 2 About Project

About Offline Examiner

2. SYSTEM ANALYSIS 6

Introduction

Existing System

Proposed System Data Flow Diagram

3. SYSTEM DESIGN 15

Input design Output design Form design Database design

23 4. APPENDIX

Source Code DFD Screen Shots

5. Normalization 38 Table design

6. SYSTEM IMPLEMENTATION 43

System configuration

7. CONCLUSION 45

8. BIBLIOGRAPHY 46

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INTRODUCTION

Offline examiner is a real time project. The project will be

implemented using VB. The aim of the project is to allow teachers to

conduct examinations to the students. There are many unique features in

the project. The students are not allowed to go back to the previous

question once they click the next question. This option is up to the

teachers to decide the teachers can either enable such an option or disable

the option. The teachers are also given option to set the time limit of the

exam. When the students start their exam, after the allotted time, the exam

automatically ends and a grade sheet is printed to the students. The exams

can be of single choice or multiple choices and this also the teachers can

make the decision.

Another important feature of the project is that the students

are not allowed to take the screen shot of the questions as a matter of

security, if students try for such a malpractice an alarm is raised in the

examination hall. Various types of reports can be generated both for the

teachers as well as the administrators.

The software will be used by three different types of users namely1. Students2. Staffs

3. Administrators

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The examination can be conducted in any number of

systems in the same lab, so that students of the same batch can do the

examinations at the same time. The questions will be issued to the

students as per the order of the computer i.e. questions will be randomly

displayed to the students.

Some of the modules that will be used in the project are:

Teachers can add new questions to the exam paper

In this software the teachers can add questions to the question set. The

questions are stored in the database. The data base is resides on the server

and the terminals can access the database and conduct the exam using the

stored questions. Teachers of each subject add the respected question

papers with the question set number and the question number. The mark

and time for each question is also set by the teachers. Teachers have to

manually enter the questions.

Teachers can set the duration of the exam

The examination duration is also set by the teachers. After the specific

time the answers are submitted to the database via the network and we

cannot answer any questions after the submission. The duration for each

exam is varied depends on the type of the examination and the type of the

subject. There are timers also for control the time duration of the

examination.

Students attend the exam

Students can attend the examination with the login username and the

password. The username and password is given by the administrator. The

authentication of the software is done using the username and password.

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The username and password is passing through the network to the server

system and the authorization is done on that system. Each student can

attend the exam for 3 time with the given user name and password. After

that they have to re-register to attend the exam.

Administrators can generate various types of reports

In this software administrator has the power to conduct the examination

and he can view the various reports like the result and the list of the passed

students, the list of students apply for the examination and the list of

student who attend the examination etc. He can get the report of the whole

examination and the percentage of mark obtained by each student. And

also he can calculate number of students passed for a particular exam in a

class.

Administrators can enable security settings.

Administrator has the control over the software and the entire system.

Administrator can add new user (teachers) and can give user name and

password. Administrator gives the username and password to the

registered students and the student can login to the system only giving the

username and password. The administrator give security like students

cannot take the screenshots of the examination screen, cannot write exam

after the specific time, cannot answer for a previous question and cannot

change the already answered question. After the specified time the

answers are submitted to the server automatically.

Print out of the grade sheet is issued when the student completes the

exam, or when the duration is finished

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After the completion of the examination the answers are submitted for

further process. The answers are compared with the database and the grade

for the students is calculated after result comparison. The students can

view and take printouts as mark sheet or score sheets using the software. If

any printer is connected with the system using software we can take the

printouts and this is the official score sheets for the students.

Students can view their past exam history

Students have the advantage that they can view the history of the

examination they wrote. They can then analyze the answers and thus find

the errors they done. The history of the examinations are stored on the

server so the administrator or the students can take the reports as hardcopy

any time.

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SYSTEM ANALYSIS

Introduction to System Analysis

System analysis is a process of gathering and interpreting facts,

diagnosing problems and the information to recommend improvements on

the system. It is a problem solving activity that requires intensive

communication between the system users and system developers. System

analysis or study is an important phase of any system development

process. The system is studied to the minutest detail and analyzed. The

system analyst plays the role of the interrogator and dwells deep into the

working of the present system. The system is viewed as a whole and the

input to the system are identified. The outputs from the organizations are

traced to the various processes. System analysis is concerned with

becoming aware of the problem, identifying the relevant and decisional

variables, analyzing and synthesizing the various factors and determining

an optimal or at least a satisfactory solution or program of action.

A detailed study of the process must be made by various techniques

like interviews, questionnaires etc. The data collected by these sources

must be scrutinized to arrive to a conclusion. The conclusion is an

understanding of how the system functions. This system is called the

existing system. Now the existing system is subjected to close study and

problem areas are identified. The designer now functions as a problem

solver and tries to sort out the difficulties that the enterprise faces. The

solutions are given as proposals. The proposal is then weighed with the

existing system analytically and the best one is selected. The proposal is

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presented to the user for an endorsement by the user. The proposal is

reviewed on user request and suitable changes are made. This is loop that

ends as soon as the user is satisfied with proposal.

Preliminary study is the process of gathering and interpreting facts,

using the information for further studies on the system. Preliminary study

is problem solving activity that requires intensive communication between

the system users and system developers. It does various feasibility studies.

In these studies a rough figure of the system activities can be obtained,

from which the decision about the strategies to be followed for effective

system study and analysis can be taken.

Existing System

In the existing system the exams are done only manually but in

proposed system we have to computerize all the exams using this

software.

Lack of security of data.

More man power.

Time consuming.

Consumes large volume of pare work.

Needs manual calculations.

No direct role for the higher officials.

Proposed System

The aim of proposed system is to develop a system of improved

facilities. The proposed system can overcome all the limitations of the

existing system. The system provides proper security and reduces the

manual work.

Security of data.

Ensure data accuracy’s.

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Proper control of the higher officials.

Minimize manual data entry.

Minimum time needed for the various processing.

Greater efficiency.

Better service.

User friendliness and interactive.

Minimum time required.

2.3. FEASIBILITY STUDY

Feasibility study is made to see if the project on completion will serve

the purpose of the organization for the amount of work, effort and the time

that spend on it. Feasibility study lets the developer foresee the future of

the project and the usefulness. A feasibility study of a system proposal is

according to its workability, which is the impact on the organization,

ability to meet their user needs and effective use of resources. Thus when

a new application is proposed it normally goes through a feasibility study

before it is approved for development.

The document provide the feasibility of the project that is being

designed and lists various areas that were considered very carefully during

the feasibility study of this project such as Technical, Economic and

Operational feasibilities. The following are its features:

2.3.1. TECHNICAL FEASIBILITY

The system must be evaluated from the technical point of view first.

The assessment of this feasibility must be based on an outline design of

the system requirement in the terms of input, output, programs and

procedures. Having identified an outline system, the investigation must go

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on to suggest the type of equipment, required method developing the

system, of running the system once it has been designed.

Technical issues raised during the investigation are:

Does the existing technology sufficient for the

suggested one?

Can the system expand if developed?

The project should be developed such that the necessary functions and

performance are achieved within the constraints. The project is developed

within latest technology. Through the technology may become obsolete

after some period of time, due to the fact that never version of same

software supports older versions, the system may still be used. So there are

minimal constraints involved with this project. The system has been

developed using Java the project is technically feasible for development.

2.3.2. ECONOMIC FEASIBILITY

The developing system must be justified by cost and benefit. Criteria

to ensure that effort is concentrated on project, which will give best, return

at the earliest. One of the factors, which affect the development of a new

system, is the cost it would require.

The following are some of the important financial questions asked

during preliminary investigation:

The costs conduct a full system investigation.

The cost of the hardware and software.

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The benefits in the form of reduced costs or fewer costly

errors.

Since the system is developed as part of project work, there is no

manual cost to spend for the proposed system. Also all the resources are

already available, it give an indication of the system is economically

possible for development.

2.3.3. BEHAVIORAL FEASIBILITY

This includes the following questions:

Is there sufficient support for the users?

Will the proposed system cause harm?

The project would be beneficial because it satisfies the objectives when

developed and installed. All behavioral aspects are considered carefully

and conclude that the project is behaviorally feasible.

DATA FLOW DIAGRAM

A Data Flow Diagram (DFD) is a diagram that describes the flow of data and

the processes that change or transform data throughout a system. It’s a structured analysis

and design tool that can be used for flowcharting in place of, or in association with,

information oriented and process oriented system flowcharts. When analysts prepare the

Data Flow Diagram, they specify the user needs at a level of detail that virtually

determines the information flow into and out of the system and the required data

resources. This network is constructed by using a set of symbols that do not imply a

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physical implementation. The Data Flow Diagram reviews the current physical system,

prepares input and output specification, specifies the implementation plan etc.

Four basic symbols are used to construct data flow diagrams. They are symbols that

represent data source, data flows, and data transformations and data storage. The points at

which data are transformed are represented by enclosed figures, usually circles, which are

called nodes.

Data Flow Diagram Symbols:-

_ Source or Destination of data

_ Data Flow

_ Process

_ Storage

Level 0 DFD

Offline ExaminerAdministrator

Admin details

Teachers

Teacher Details

StudentsStudent Details

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Level 1 DFD Administrator

Level 1 DFD Teacher

Administrator

Login

Login

Offline Examiner

Student details

results

Login

Admin id, password

validate

verify

StudentAdd login details

View results

Add Details

Validate

Verify

Login

login id, password

login

Questions

Add QuestionsTeacher

Add Questions and set time

Questions

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Level 1 DFD Student

Level 2 DFD Administrator

validate

login id, password

Student OfflineExaminer

login

Store results

results

Select exam

Login

verify

User Details

details

Administrator

View reports

Add User

User details

Login

reports

Delete User

View reportsView reports

Delete

Login id, password

User details

Select User

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Level 2 DFD Student

QuestionWrite exam

Student

View history

View grade

Results

Select exam

Get details

Get grade

View history

Questions

Store results

grade

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SYSTEM DESIGN

Introduction to System Design

Design is the first step into the development phase for any engineered

product or system. Design is a creative process. A good design is the key

to effective system. The term “design” is defined as “the process of

applying various techniques and principles for the purpose of defining a

process or a system in sufficient detail to permit its physical realization”.

It may be defined as a process of applying various techniques and

principles for the purpose of defining a device, a process or a system in

sufficient detail to permit its physical realization. Software design sits at

the technical kernel of the software engineering process and is applied

regardless of the development paradigm that is used. The system design

develops the architectural detail required to build a system or product. As

in the case of any systematic approach, this software too has undergone

the best possible design phase fine tuning all efficiency, performance and

accuracy levels. The design phase is a transition from a user oriented

document to a document to the programmers or database personnel.

System design goes through two phases of development: Logical and

Physical Design.

Input design

The design of input focuses on controlling the amount of input

required, controlling the errors, avoiding delay, avoiding extra steps and

keeping the process simple. The input is designed in such a way so that it

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provides security and ease of use with retaining the privacy. Input Design

considered the following things:

o What data should be given as input?

o How the data should be arranged or coded?

o The dialog to guide the operating personnel in providing input.

o Methods for preparing input validations and steps to follow when error

occur.

OUTPUT DESIGN

A quality output is one, which meets the requirements of the end user

and presents the information clearly. In output design it is determined how

the information is to be displaced for immediate need and also the hard

copy output. It is the most important and direct source information to the

user. Efficient and intelligent output design improves the system’s

relationship to help user decision-making.

Designing computer output should proceed in an organized, well

thought out manner; the right output must be developed while ensuring

that each output element is designed so that people will find the system

can use easily and effectively. When analysis design computer output,

they should :

Identify the specific output that is needed to meet the requirements.

Select methods for presenting information.

Create document, report, or other formats that contain information

produced by the system.

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Form design- Sample Screen Shots

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Sample Coding

Login

Private Sub cmdAdminLog_Click()Set rs = con.Execute("select * from Adminlogin where Username='" + txtUsername.Text + "' and Password='" + txtPassword.Text + "'")If (Not rs.EOF) Then MsgBox "Login Success", vbInformation, "Offline Examiner" Unload MeEnd Ifrs.CloseEnd Sub

Private Sub cmdCancel_Click()Unload MeEnd SubPrivate Sub cmdTchLog_Click()Set rs = con.Execute("select * from Userlogin where Username='" + txtUsername.Text + "' and Password='" + txtPassword.Text + "'")If (Not rs.EOF) Then MsgBox "Login Success", vbInformation, "Offline Examiner"

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Unload MeEnd IfEnd Sub

Private Sub Form_Load()connectdbEnd Sub

Add Branch

Private Sub cmdAdd_Click()If (txtbrname.Text = "" Or txtbrcode.Text = "" Or txtsem.Text = "") Then MsgBox "Missing Fields", vbInformation, "Offline Examiner"Else con.Execute ("insert into Branch values('" + txtbrname.Text + "','" + txtbrcode.Text + "'," + txtsem.Text + ")") MsgBox "Record added successfully", vbInformation, "Offline Examiner" txtbrname.Text = "" txtbrcode.Text = "" txtsem.Text = "" txtbrname.SetFocusEnd IfEnd Sub

Private Sub cmdCancel_Click()Unload MeEnd Sub


Add Subject

Dim x As IntegerDim i As Integer

Private Sub cmbBranch_Click() cmbSem.Clear Set rs = con.Execute("select Sem from Branch where Branchcode='" + cmbBranch.Text + "'") If (Not rs.EOF) Then

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x = rs(0) For i = 1 To x cmbSem.AddItem i Next End If End Sub

Private Sub cmdAdd_Click()If (cmbBranch.Text = "" Or cmbSem.Text = "" Or txtSubname.Text = "" Or txtSubCode.Text = "") Then MsgBox "Missing Fields", vbInformation, "Offline Examiner"Else con.Execute ("insert into Subjects values('" + cmbBranch.Text + "'," + cmbSem.Text + ",'" + txtSubname.Text + "','" + txtSubCode.Text + "')") MsgBox "Record added sucessfully", vbInformation, "Offline Examiner" txtSubname.Text = "" txtSubCode.Text = "" txtSubname.SetFocusEnd IfEnd Sub


Private Sub Form_Load()connectdbSet rs = con.Execute("select * from Branch")While (Not rs.EOF) cmbBranch.AddItem rs(1) rs.MoveNextWendrs.CloseEnd Sub

Add Questions

Dim x, i As IntegerDim exid As StringDim eID As StringDim Qno As Integer

Private Sub cmbBranch_Click()cmbSem.Clear

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Set rs = con.Execute("select Sem from Branch where Branchcode='" + cmbBranch.Text + "'") If (Not rs.EOF) Then x = rs(0) For i = 1 To x cmbSem.AddItem i Next End If rs.CloseEnd Sub

Private Sub cmbSem_Click() cmbSubjects.Clear Set rs = con.Execute("select Subjectname from Subjects where Branchcode='" + cmbBranch.Text + "' and Sem=" + cmbSem.Text + "") While (Not rs.EOF) cmbSubjects.AddItem rs(0) rs.MoveNext Wend rs.CloseEnd SubPrivate Sub cmbSubjects_Click() Set rs = con.Execute("select Subjectcode from Subjects where Subjectname='" + cmbSubjects.Text + "' and BranchCode='" + cmbBranch.Text + "'") If (Not rs.EOF) Then txtSubCode.Text = rs(0) End If rs.CloseEnd Sub

Private Sub cmdAdd_Click()If (txtAns.Text = "" Or txtOpt1.Text = "" Or txtOpt2.Text = "" Or txtOpt3.Text = "" Or txtOpt4.Text = "" Or txtQst.Text = "") Then MsgBox "Missing Fields", vbInformation, "Offline Examiner"Else If (txtOpt1.Text <> txtAns.Text And txtOpt2.Text <> txtAns.Text And txtOpt3.Text <> txtAns.Text And txtOpt4.Text <> txtAns.Text) Then MsgBox "Answer key does not match any one of 4 options", vbCritical, "Offline Examiner" txtAns.Text = "" txtAns.SetFocus Else exid = cmbBranch.Text + txtDate.Text + txtSubCode.Text

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con.Execute ("insert into Questions values('" + cmbBranch.Text + "'," + cmbSem.Text + _ ",'" + txtSubCode.Text + "','" + exid + "','" + lblQno.Caption + _ "','" + txtQst.Text + "','" + txtOpt1.Text + "', '" + txtOpt2.Text + _ "','" + txtOpt3.Text + "','" + txtOpt4.Text + "','" + txtAns.Text + "')") con.Execute ("insert into ExamDetails values('" + cmbBranch.Text + "'," + cmbSem.Text + _ ",'" + txtSubCode.Text + "','" + exid + "','" + txtDate.Text + "','" + txtTime.Text + "')") MsgBox "Question Added Successfully", vbInformation, "Offline Examiner" txtAns.Text = "" txtOpt1.Text = "" txtOpt2.Text = "" txtOpt3.Text = "" txtOpt4.Text = "" txtQst.Text = "" txtQst.SetFocus lblQno.Caption = lblQno.Caption + 1 End IfEnd IfEnd Sub


Private Sub cmdNext_Click()If (txtSubCode.Text = "" Or txtDate.Text = "" Or txtTime.Text = "") Then MsgBox "Please Select and fill all the fields" Frame1.Visible = True Frame2.Visible = FalseElse lblSubName.Caption = cmbSubjects.Text lblSubCode.Caption = txtSubCode.Text eID = cmbBranch.Text + txtDate.Text + txtSubCode.Text Set rs = con.Execute("select count(*) from Questions where BranchCode='" + cmbBranch.Text + _ "' and Sem=" + cmbSem.Text + " and SubjectCode='" + txtSubCode.Text + _ "' and ExamID='" + eID + "'") If (Not rs.EOF) Then Qno = rs(0)

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Qno = Qno + 1 Else Qno = 1 End If lblQno.Caption = Qno Frame1.Visible = False Frame2.Visible = TrueEnd IfEnd Sub

Private Sub Form_Load()Frame1.Visible = TrueFrame2.Visible = FalseconnectdbSet rs = con.Execute("select * from Branch")While (Not rs.EOF) cmbBranch.AddItem rs(1) rs.MoveNextWendrs.CloseEnd Sub

Add User

Private Sub cmdAdd_Click()Set rs = con.Execute("select * from Userlogin where Username='" + txtUsername.Text + "' and Password='" + txtPassword.Text + "'")If (Not rs.EOF) Then MsgBox "Sorry!! User already exists. Try another username", vbCritical, "Offline Examiner" txtPassword.Text = "" txtUsername.Text = "" txtUsername.SetFocusElse con.Execute ("insert into Userlogin values('" + txtUsername.Text + "','" + txtPassword.Text + "')") MsgBox "User added sucessfully", vbInformation, "Offline Examiner" txtPassword.Text = "" txtUsername.Text = "" txtUsername.SetFocusEnd If

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End Sub



Change Password


Private Sub cmdChange_Click()If (txtConfrmpass.Text = txtNewpass.Text) Then Set rs = con.Execute("select * from Userlogin where Username='" + cmbUsername.Text + "' and password='" + txtcurpassword.Text + "'") If (Not rs.EOF) Then con.Execute ("update Userlogin set Password='" + txtNewpass.Text + "' where Username='" + cmbUsername.Text + "'") MsgBox "Password successfully updated!!", vbInformation, "Offline Examiner" Else MsgBox "Invalid Password", vbCritical, "Offline Examiner" txtcurpassword.Text = "" txtcurpassword.SetFocus End IfElse MsgBox "Password Mismatch!!", vbInformation, "Offline examiner" txtConfrmpass.Text = "" txtNewpass.Text = "" txtNewpass.SetFocusEnd IfEnd Sub

Private Sub Form_Load()connectdbSet rs = con.Execute("select * from Userlogin")While (Not rs.EOF) cmbUsername.AddItem rs(0) rs.MoveNextWendrs.Close

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End Sub

Delete User


Private Sub cmdDelete_Click()con.Execute ("delete from Userlogin where Username='" + cmbUsername.Text + "'")MsgBox "User deleted sucessfully!!", vbInformation, "Offline Examiner"cmbUsername.Text = ""End Sub

Private Sub Form_Load()connectdbSet rs = con.Execute("select * from Userlogin")While (Not rs.EOF) cmbUsername.AddItem rs(0) rs.MoveNextWendEnd Sub

Select Exam

Dim dt As Date

Private Sub cmbBranch_Click()cmbSem.ClearSet rs = con.Execute("select Sem from Branch where BranchCode='" + cmbBranch.Text + "'") If (Not rs.EOF) Then x = rs(0) For i = 1 To x cmbSem.AddItem i Next End If rs.CloseEnd Sub

Private Sub cmbExID_Click()Set rs = con.Execute("select Time from ExamDetails where ExamId='" + cmbExID.Text + "'")

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If (Not rs.EOF) Then txtTime.Text = rs(0)End Ifrs.CloseEnd Sub

Private Sub cmbSem_Click() cmbSub.Clear Set rs = con.Execute("select Subjectname from Subjects where Branchcode='" + cmbBranch.Text + "' and Sem=" + cmbSem.Text + "") While (Not rs.EOF) cmbSub.AddItem rs(0) rs.MoveNext Wend rs.CloseEnd Sub

Private Sub cmbSub_Click()

Set rs = con.Execute("select Subjectcode from Subjects where Subjectname='" + cmbSub.Text + "'") If (Not rs.EOF) Then txtSubCode.Text = rs(0) End If rs.CloseSet rs = con.Execute("select distinct(ExamID) from ExamDetails where BranchCode='" + cmbBranch.Text + _ "' and Sem=" + cmbSem.Text + " and SubjectCode='" + txtSubCode.Text + "' and ExDate=#" & Date & "#") While (Not rs.EOF) cmbExID.AddItem rs(0) rs.MoveNext Wend rs.CloseEnd Sub

Private Sub cmdStart_Click()If (cmbBranch.Text = "" Or cmbExID.Text = "" Or cmbSem.Text = "" Or cmbSub.Text = "") Then MsgBox "Missing fields, Please fill up all", vbInformation, "Offline Examner"Else bcode = cmbBranch.Text sem = cmbSem.Text

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subcode = txtSubCode.Text exid = cmbExID.Text Load frmExam frmExam.Show Unload MeEnd IfEnd Sub

Private Sub Command1_Click()Unload MeEnd Sub

Private Sub Form_Load()connectdbSet rs = con.Execute("select * from Branch")While (Not rs.EOF) cmbBranch.AddItem rs(1) rs.MoveNextWendrs.CloseEnd Sub

Start Exam


Private Sub cmdEnter_Click()Set rs = con.Execute("select * from Student where Username='" + txtUname.Text + "' and Password='" + txtPass.Text + "'")If (Not rs.EOF) Then MsgBox "Login Success", vbInformation, "Offline Examiner" uname = txtUname.Text Load frmSelectExam frmSelectExam.Show Unload MeElse MsgBox "Invalid Username or Password", vbCritical, "Offline Examiner"

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End If

End Sub


Exam

Dim x As IntegerDim ar(5) As IntegerDim y, i As IntegerDim Qcnt As IntegerDim z As IntegerDim ans As StringDim selected As StringDim mark As IntegerDim rslt As String

Private Sub cmdFinish_Click()If (mark >= 3) Then rslt = "Passed"Else rslt = "Failed"End Ifcon.Execute ("insert into Result values('" & uname & "','" & bcode & "'," & sem & ",'" & subcode & "','" & exid & "'," & mark & ",'" & rslt & "')")MsgBox markUnload MeEnd Sub

Private Sub cmdNext_Click()Qcnt = Qcnt + 1If (Qcnt <= 5) ThenSet rs = con.Execute("select * from Questions where BranchCode='" & bcode & "' and Sem=" & sem & " and SubjectCode='" & subcode & "' and ExamID='" & exid & "' and Qno=" & ar(Qcnt - 1) & " ")If (Not rs.EOF) Then lblQno.Caption = Qcnt lblQst.Caption = rs(5) Option1.Caption = rs(6) Option2.Caption = rs(7) Option3.Caption = rs(8) Option4.Caption = rs(9) ans = rs(10)

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If (Option1.Value = True) Then selected = Option1.Caption ElseIf (Option2.Value = True) Then selected = Option2.Caption ElseIf (Option3.Value = True) Then selected = Option3.Caption ElseIf (Option4.Value = True) Then selected = Option4.Caption End If End IfElse MsgBox "Exam Completed", vbInformation, "Offline Examiner" cmdNext.Enabled = False cmdFinish.Enabled = TrueEnd IfIf (ans = selected) Then mark = mark + 1End IfEnd Sub

Private Sub Form_Load()connectdbQcnt = 1Set rs = con.Execute("select count(*) from Questions where BranchCode='" + bcode + "' and Sem=" & sem & " and SubjectCode='" + subcode + "' and ExamID='" + exid + "' ")If (Not rs.EOF) Then x = rs(0)End Ifrs.Closey = RandomNumbers(x, 2, 5)For i = LBound(y) To UBound(y)ar(i) = y(i)NextFor i = 0 To 4' If (ar(i) = 0) Then' ar(i) = 1' End If 'MsgBox ar(i)

NextSet rs = con.Execute("select * from Questions where BranchCode='" & bcode & "' and Sem=" & sem & " and SubjectCode='" & subcode & "' and ExamID='" & exid & "' and Qno=" & ar(0) & " ")If (Not rs.EOF) Then

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lblQno.Caption = Qcnt lblQst.Caption = rs(5) Option1.Caption = rs(6) Option2.Caption = rs(7) Option3.Caption = rs(8) Option4.Caption = rs(9)End Ifrs.ClosecmdFinish.Enabled = FalseEnd SubPublic Function RandomNumbers(Upper As Integer, _ Optional Lower As Integer = 1, _ Optional HowMany As Integer = 1, _ Optional Unique As Boolean = True) As Variant

On Error GoTo LocalError If HowMany > ((Upper + 1) - (Lower - 1)) Then Exit Function Dim x As Integer Dim n As Integer Dim arrNums() As Variant Dim colNumbers As New Collection ReDim arrNums(HowMany - 1) With colNumbers 'First populate the collection For x = Lower To Upper .Add x Next x For x = 0 To HowMany - 1 n = RandomNumber(0, colNumbers.Count + 1) arrNums(x) = colNumbers(n) If Unique Then colNumbers.Remove n End If Next x End With Set colNumbers = Nothing RandomNumbers = arrNumsExit FunctionLocalError: 'Justin (just in case) RandomNumbers = ""End Function

Public Function RandomNumber(Upper As Integer, _

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Lower As Integer) As Integer 'Generates a Random Number BETWEEN the LOWER and UPPER values Randomize RandomNumber = Int((Upper - Lower + 1) * Rnd + Lower) End Function

DATABASE DESIGN

A database is an organized mechanism that has the capability of storing

information through which a user can retrieve stored information in an

effective and efficient manner. The data is the purpose of any database and

must be protected.

The database design is a two level process. In the first step, user

requirements are gathered together and a database is designed which will

meet these requirements as clearly as possible. This step is called

Information Level Design and it is taken independent of any individual

DBMS.

In the second step, this Information level design is transferred into a

design for the specific DBMS that will be used to implement the system in

question. This step is called Physical Level Design, concerned with the

characteristics of the specific DBMS that will be used. A database design

runs parallel with the system design. The organization of the data in the

database is aimed to achieve the following two major objectives.

Data Integrity

Data independence

Normalization is the process of decomposing the attributes in an

application, which results in a set of tables with very simple structure. The

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purpose of normalization is to make tables as simple as possible.

Normalization is carried out in this system for the following reasons.

To structure the data so that there is no repetition of data , this helps in

saving.

To permit simple retrieval of data in response to query and report request.

To simplify the maintenance of the data through updates, insertions,

deletions.

To reduce the need to restructure or reorganize data which new application

requirements arise.

RELATIONAL DATABASE MANAGEMENT SYSTEM (RDBMS):

A relational model represents the database as a collection of relations.

Each relation resembles a table of values or file of records. In formal

relational model terminology, a row is called a tuple, a column header is

called an attribute and the table is called a relation. A relational database

consists of a collection of tables, each of which is assigned a unique name.

A row in a tale represents a set of related values.

RELATIONS, DOMAINS & ATTRIBUTES:

A table is a relation. The rows in a table are called tuples. A tuple is an

ordered set of n elements. Columns are referred to as attributes.

Relationships have been set between every table in the database. This

ensures both Referential and Entity Relationship Integrity. A domain D is

a set of atomic values. A common method of specifying a domain is to

specify a data type from which the data values forming the domain are

drawn. It is also useful to specify a name for the domain to help in

interpreting its values. Every value in a relation is atomic, that is not

decomposable.

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RELATIONSHIPS:

Table relationships are established using Key. The two main keys of

prime importance are Primary Key & Foreign Key. Entity Integrity and

Referential Integrity Relationships can be established with these

keys.Entity Integrity enforces that no Primary Key can have null

values.Referential Integrity enforces that no Primary Key can have null

values.

Referential Integrity for each distinct Foreign Key value, there must exist

a matching Primary Key value in the same domain. Other key are Super

Key and Candidate Keys.

Relationships have been set between every table in the database. This

ensures both Referential and Entity Relationship Integrity.

NORMALIZATION:

As the name implies, it denoted putting things in the normal form. The

application developer via normalization tries to achieve a sensible

organization of data into proper tables and columns and where names can

be easily correlated to the data by the user. Normalization eliminates

repeating groups at data and thereby avoids data redundancy which proves

to be a great burden on the computer resources. These includes:

Normalize the data.

Choose proper names for the tables and columns.

Choose the proper name for the data.

First Normal Form:

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The First Normal Form states that the domain of an attribute must

include only atomic values and that the value of any attribute in a tuple

must be a single value from the domain of that attribute. In other words

1NF disallows “relations within relations” or “relations as attribute values

within tuples”. The only attribute values permitted by 1NF are single

atomic or indivisible values.

The first step is to put the data into First Normal Form. This can be

donor by moving data into separate tables where the data is of similar type

in each table. Each table is given a Primary Key or Foreign Key as per

requirement of the project. In this we form new relations for each

nonatomic attribute or nested relation. This eliminated repeating groups of

data.

A relation is said to be in first normal form if only if it satisfies the

constraints that contain the primary key only.

Second Normal Form:

According to Second Normal Form, For relations where primary key

contains multiple attributes, no nonkey attribute should be functionally

dependent on a part of the primary key.

In this we decompose and setup a new relation for each partial key with

its dependent attributes. Make sure to keep a relation with the original

primary key and any attributes that are fully functionally dependent on it.

This step helps in taking out data that is only dependant on apart of the

key.

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A relation is said to be in second normal form if and only if it satisfies

all the first normal form conditions for the primary key and every non-

primary key attributes of the relation is fully dependent on its primary key

alone.

Third Normal Form:

According to Third Normal Form, Relation should not have a nonkey

attribute functionally determined by another nonkey attribute or by a set of

nonkey attributes. That is, there should be no transitive dependency on the

primary key.

In this we decompose and set up relation that includes the nonkey

attributes that functionally determines other nonkey attributes. This step is

taken to get rid of anything that does not depend entirely on the Primary

Key.

A relation is said to be in third normal form if only if it is in second

normal form and more over the non key attributes of the relation should

not be depend on other non key attribute.

Table Design

Table: Admin Login

Primary: Username

Field Name Data Type Constrains Description

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Username Text Not Null Primary KeyPassword Text Not Null

Table: Branch

Primary: BranchCode


BranchName Text Not Null

BranchCode Text Not Null Primary Key

Sem Number Not Null

Table: ExamDetails

Primary: ExamID



BranchCode Text Not Null

Sem Number Not Null

SubjectCode Text Not Null

ExamId Text Not Null Primary Key

ExamDate Date/Time Not Null

Time Date/Time Not Null

Table: Questions

Primary: ExamID

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Sem Number Not Null



Qst Text Not Null

Choice 1 Text Not Null




Answer Text Not Null

Table: Results

Primary: ExamID


Username Text Not Null



Sem Number Not Null



Mark Number Not Null

Result Text Not Null

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Table: Student

Primary: Username

Field Name Data Type Constrains DescriptionUsername Text Not Null Primary KeyPassword Text Not Null

Table: Subjects

Primary: SubjectCode



Sem Number Not Null

SubjectCode Text Not Null Primary Key

SubjectName Text Not Null

SYSTEM IMPLEMENTATION

About Language

Microsoft Visual Basic 6.0

Visual Basic 6.0 is Microsoft’s latest version of the Visual Basic Programming

language. Although writing programs can be a tedious chore at time. Visual Basic

reduces the effort required on your part, and makes programming enjoyable. Visual

Basic makes many aspects of programming as simple as dragging graphics objects on to

screen with your mouse.

Visual Basic 6.0 is more than just a programming language; the secret to Visual

Basic is in its name” Visual”. With to days Windows Operating System, a program must

be able to interact with the screen. Keyboard, mouse and printer graphically.

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The environment provided by Visual Basic is suitable for any type of application.

Using this environment, the user can visually design the objects that your application

uses. Visual Basic is not just a languages, it’s an integrated development environment in

which you can develop, run, test and debug your applications. The impressive array of

programming resources provided by Visual Basic enables to create the objects

extemporaneously which can range from pop-up menu to a message box.

A form is a major part of Visual Basic application, which allows the user to enter

the data as well as view the result. A control is an object that we draw on a form to

enable or enhance user interaction with an application. Hence a Visual Basic application

is a combination of object like forms and controls, procedures that can respond to Events

and other general-purpose procedures.

System Configuration

HARDWARE REQUIREMENTS

Processor : X86 Compatible processor

with 1.7 GHz Clock speed

RAM : 512 MB or more

Hard disk : 20 GB or more

Monitor : VGA/SVGA

Keyboard : 104 Keys

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Mouse : 2 buttons/ 3 buttons

SOFTWARE REQUIREMENTS

Operating System : Windows 2000/XP

Front end : Visual Basic 6.0

Back end : MsAccess

Conclusion

Advantages

1. Exam can be conducted easily.

2. Exam time management i.e., Exam starts and end at the right time.

3. Valuation is easy and result can be published with in time.

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4. Only manual work needed is entering questions and corresponding right

answer key.

5. No mishap is possible because the system is password protected.

Disadvantages

1. Exam won’t be conducted if there is power failure.

2. Exam can’t be conducted without Hub.

BIBLIOGRAPHY

Books

A Complete Guide to Programming in Visual Basic .Net

A Complete Visual Basic 6 Training Course: How to

Programme: Package

Advanced Programming Using Visual Basic: Version 6.0

Access 2003 Power Programming with VBA

Advanced MS Visual Basic

Site Address

www.associatedcontent.com

www.members.tripod.com

www.vbcodesource.com

http://www.vbcodesource.com/

http://www.members.tripod.com/

http://www.associatedcontent.com/

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Documents

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