System Analysis and Design
Data Definition Language (DDL)

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

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System Analysis and Design
The term Parallel Run refers to

All of these
the same job run on two different computer to test their speeds
the processing of two different jobs initiated from two terminals.
None of these
the concurrent operation of an existing system and a new system

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System Analysis and Design
In top down analyis and design

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

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