Higher-level DFDs add detail and definition to the lower levels, similarly to zooming in on a computer screen.
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Q98: A project that is feasible at one
Q99: Unlike ERDs, systems analysts seldom use DFDs
Q100: Larger companies often have one systems analyst
Q101: The project dictionary helps everyone keep track
Q102: To obtain information from a large number
Q104: A user may request a new or
Q105: On a class diagram, each superclass inherits
Q106: Horizontal market software typically is more expensive
Q107: The systems analyst creates the data dictionary
Q108: 
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