Question: In a data flow diagram ( DFD ) , a black hole is a process that has at least one input and one output, but

In a data flow diagram (DFD), a black hole is a process that has
at least one input and one output, but the input obviously is insufficient to generate the output shown
no output
no input
at least one output and one input, but the output obviously is insufficient to generate the input shown
In a data flow diagram ( DFD ) , a black hole is

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