System Analysis and Design
Rapid prototyping proves the quality of a design by

None of these
having a data flow diagram
having a program simulate the real system
both (a) and (b)
having the system analyst present an overview of the design to users, programmers, and consultants

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System Analysis and Design
Data manipulation language (DML)

determine how data must be structured to produce the user's view
all of the listed here
specifies for the DBMS what is required; the techniques used to process data
describes how data are structured in the data base

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System Analysis and Design
A square symbols

identifies data flow
is a data store-data at rest, or a temporary repository of data
defines a source or destination of system data
None of these
represents a process that transforms incoming data flow(s) into outgoing data flows

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