System Analysis and Design
A couple:

None of these
None of these
is a data item that moves from one module to another
means that the upper module has the capability of calling the lower module
is represented by a line joining two modules

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System Analysis and Design
In top down analyis and design

each succeeding phase is less detailed than the phase before it
all of the listed here
each succeeding phase is as detailed as the phase before it.
each succeeding phase is more detailed than the phase before it

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