Data Flow Diagrams - What is DFD? Data Flow Diagram Symbols and More

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A data flow diagram, also known as DFD, helps you visualize how data is processed by or "flows through" a system in terms of inputs and outputs. This is especially useful in software development. Watch this video to learn more about data flow diagrams, its symbols and notations, and more.

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Much better explanation than the TWO slides provided by my professor at Texas A&M San Antonio

nzkshatriya

You are making the world a better place. Thanks!

DavidPrenticeJr

thank you, you totally made this explanation easy to understand.

gabybravo

very good. which software are you using? could you provide me the name?

NavinGurung-NG

can i upload your video in my channel but in arabic translation sir? i well refer that its yours video just translated into arabic language sir coz its really amazing how simple and easy to understand sir
thank you very much for your wonderful explanation in advance sir

mSami

Can I use this video for one of my clases and translated to spanish?

cristophervega

Your voice is amazing feels to listen more...

BurningSpottOfficial

Is this the same jingle from YouTube questionnaries?

gpietra

Very well explained. Thank you for sharing.

hajeraabdullah

The following are the details of the process documented through an exams handling information system.

(i)Candidate submits an official registration form for an examinations purpose at a definite or stated date including the examinations centre.

(ii)The exams clerk checks to ensure the exam is actually being held at a specified date and centre. Where there is doubt, the candidate receives back the registration form.

(iii)If it is okay, the exams clerk inputs the candidate’s particulars into the computer system. The system then automatically assigns the next accessible or available registration number to the registered candidate, and the last number allocated or assigned on the CANDIDATE–file-plus one.

(iv)The examinations clerk inputs the mandatory exams date and centre. The system assigns a seat number accordingly to that candidate for example (from the previous seat number and in that centre on a specified date-plus one).

(v)Candidate details (name, centre, number, examination date, address and seat number) are subsequently stored or kept on a CANDIDATE file. The details are printed out and then sent to the destination of the candidate.

Required:

(a)Construct a suitable process model (for example, a Data Flow Diagram, or Entity Relationship Diagram, or a flowchart) for the above business requirement.

(b)Provide the explanatory key to the model for the user to understand the notation.

(c)Pinpoint two questions the systems analyst should ask in order to improve the accuracy of your model. Explain the reason for asking eachof the questions.

Please help me out

nakazzihadijjah