29-12-2015, 04:58 PM
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 namely
1. Students
2. Staffs
3. Administrators
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. 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
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.
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 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.
• 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.
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 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.
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 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.