A Data Flow Diagram (Or DFD)has Four Basic Elements

question 84

Multiple Choice

A data flow diagram (or DFD) has four basic elements.The flow of data between processes,data stores,and data sources and destinations is known as

• A)data sources and destinations.
• B)data flows.
• C)transformation processes.
• D)data stores.

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Definitions:

Case-control Study

A type of observational study where two groups are compared: those with the disease or outcome of interest (cases) and those without the disease (controls), to identify factors that may contribute to the disease's presence.

Case-series

A descriptive study type that tracks subjects with a known exposure or treatments to document outcomes.

Cross-sectional Survey

A variety of observational research that evaluates information gathered from a whole population or a proportional segment, during a singular time frame.

Serostatus

The presence or absence of specific antibodies or antigens in the blood, indicating whether an individual has been exposed to a particular pathogen or not.