System Analysis and Design
The mistake, committed by interchanging two digits in a numeric held, during data entry, is called

Beta testing error
transposition error
transcription error
Alpha testing error

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System Analysis and Design
The black-box concept:

None of these
All of these
assumes that the black box is independent
assumes that inputs and outputs will remain stable
is invoked by describing a system in terms of inputs and outputs, leaving the transformation process a black box.

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System Analysis and Design
Data Definition Language (DDL)

specifies for the DBMS what is required; the techniques used to process data
all of the listed here
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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