Online Examination System Dataflow Diagram | DFD

Online Examination System Dataflow Diagram | DFD Levels 0, 1 & 2

Online Examination System DFD – or also known as Dataflow Diagram displays and explains the flow of data inside the system. It gives detailed illustration of data transformation and processes from being an input up to making it an output. It also tells how the system receives the input, store it in a database and how it is managed throughout the figured process. The processes and transformations of data was specified in Data Flow Diagram (DFD) Levels 0, 1 and of Online Examination Management system.

Dataflow Diagrams (DFD) has a big help in developing any system including Online Examination. In the rapidly growing technology, software are also evolving and makes a big change in our everyday activities. From the manual doing of task in offices and establishment even in schools, soft ware is now applied. So in developing every software, you’ll be needing Dataflow Diagrams.

Here’s what you need to know.

The Data Flow Diagram (DFD) represents the flow of data and the transformation of processes happens in Online Examination System. And in the DFD, input, processing, and output are used to represent and define the overall flow of the system. Upon reading through this article, you’ll then find how the system react with the user and handle data it receives.

You also need to be informed that the DFD Diagram helps you determine the needed data inputs and possible output in Online Examination system. It is because, the Dataflow diagram is a designed to meet the needed data information for system development. It is also part of the Capstone Project Documentation that informs panels and readers about the flow of essential data in the system.

To have an advance knowledge about the Online Examination System, you must be familiarize with these symbols:

Data Flow Diagram Symbols

Dataflow Diagram (DFD) for Online Examination System and its Levels 0, 1 & 2

Time needed: 10 minutes.

Now here’s the Dataflow Diagram levels 0, 1 & 2 for Online Examination Management System and the explanation of each levels.

  • Online Examination Management System Data Flow Diagram Level 0

    To start with, let us familiarize what is Online Examination System Data Flow Diagram level 0.

    The Online Examination System DFD level 0 is also known as context diagram. It’s shows an abstract view of main processes included in Online Examination System .

    This DFD level 0 illustration depicts the overall structure of the Online Examination System as a single bubble. Then its details will be specified as the DFD levels gets more distinct. It also comes with incoming/outgoing indicators or arrow showing input and output data.

    In this data flow diagram you will see the general process done in Online Examination System . It shows the main process, main actor/actors and the arrows with labels to know the flow of data.

    As you see, when you build the levels of data flow diagrams, the connections of the transactions and data also broadens and gets more specific.

  • Online Examination Management System Data Flow Diagram Level 1

    Next to the context diagram is the level 1 data flow diagram.

    The content of Online Examination System DFD level 1 must be in accord from the idea of context diagram. the ideas presented in the context diagram was broken down into more specific details. Its main process was broken down into the processes that completes it. Then you will determined the needed data to complete each processes in Online examination System.

    The following are essential data to accommodate:
    • Examinee’s Records
    • Exam Information
    • Exam Details
    • Schedules
    • Exam Records
    • Overall Reports

    These procedures require information such as record of examinee’s, exam details and records, schedules and overall reports from which served as the basis for the Examination admin to manage all Examinees. These records are used in processes stated and were stored in the data store that you will see in the next level.

    With being knowledgeable about the DFD level 1 of the Online Examination System, you will know then its broaden context terms.

    In addition to that, this level shows how the inputs or data fed on the system were processed. Then you will be also informed about the outputs that the system gives. And the processes shown in this DFD Level 1 were all based on the concept of the stated Online Examination Management System Project.

  • Online Examination Management System Data Flow Diagram Level 3

    After understanding the Data Flow Diagram levels 0 and 1, next in line is the level 2.

    Here’s what you need to consider in creating data flow diagram level 2 for Online Examination Management System.
    • DFD Level 2 should present the system specific components, database and flow of data between the processes and actors of the Online Examination Management.
    • Since the DFD level 2 is the highest abstraction level, Online Examination Management System processes must be detailed that is continuation of the DFD level 1.

    DFD level 2 let’s you know the ideas on where does the data inputs goes after every processes within the Online Examination Management System. Considering the the dataflow levels mentioned above, you can determine well the importance of breaking the processes into more specific manner.

    The presented level not only shows you the detailed processes of system, but also gives you precise destination of the data that flows in the system. This Data Flow Diagram will also be your references as you make and design your own Online Management System.

Additional Knowledge on DFD Levels 0, 1 & 2 of Online Examination Management System.

Online Examination Management System Data Flow Diagram Level 0 (Context Diagram)

A context diagram is another name for DFD Level 0. With the mechanism represented as a single process and external parties it will be an abstract view. It depicts the overall structure as a single bubble with incoming/outgoing indicators showing input and output data.

The data flow diagram level 0 also considers the entire system to be a single process and emphasizes the system’s interaction with external entities.

Context diagrams (level 0 DFDs) are diagrams in which the entire system is represented as a single process. A single process node and its connections to external entities are depicted in Level 0 data flow diagrams.

Online Examination Management System Data Flow Diagram Level 1 (Detonated View)

Level 1 DFDs provide a broad overview but go into greater depth than a context diagram. The single process node from the context diagram is broken down into sub processes in a level 1 data flow diagram. It lists all of the major sub-processes that make up the entire system. A level 1 DFD can be thought of as a “detonated view” of the context diagram.

A single production node and its relationships to external entities are depicted in Level 0 data flow diagrams. And it provides broad overview but go into greater depth than a context diagram.

Online Examination Management System Data Flow Diagram Level 2

The 2-level DFD delves even deeper into the concepts of 1-level DFD. It can be used to plan or record all of the specific/necessary information about how the system works.

Level 2 DFD is the DFD’s highest abstraction level and represents the system’s basic modules as well as data flow between them.

Conclusion

All in all, the ideas explained in this article were all formulated to provide you the exact details on how would you build your own data flow diagrams. It is also to make sure that the data inputs and outputs are in the right place while building the said project.

Now why should you make your data flow diagram right?

It is because, the data flow diagram serves as the blueprint of how would you secure the flow of data in the project. And through this, you will be able to build your project right and meet the given requirements.

And that completes our discussion about data flow diagram! And I hope that this discussion about Online Examination Management System Data Flow Diagram Levels 0, 1 and 2 will help you a lot.

Now let me ask you something. What have you learned through the discussion?

May this article help you with your projects in the future!

If you have inquiries or suggestions about Online Examination Management System Data flow Diagram (DFD) and its Levels 0, 1 and 2 just leave us your comments below.

You could also download the PDF file of the discussed project to have the reference while doing your project. This PDF file is applicable for any Data Flow Diagram building.

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