Data Flow Diagrams (DFDs)
Looking at the key symbols used in DFDs, including processes, external entities, and data stores. The difference between Level 0 and Level 1 DFDs is explained, along with some rules for creating Level 1 DFDs.
This video is primarily designed for the written Unit 2 exam (Global Information) for the OCR Cambridge Technicals (CTEC) Level 3 Information Technology qualifications. Video #3 of LO5 (Understand the process flow of information).
For the ordered playlist of videos for the CTEC IT Global Information (Unit 2) exam, see here: • CTEC/ CTECH IT Level 3 - Unit 2 (Glob...
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