System Analysis and Design
Direct-access organization

means storing records in contiguous blocks according to a key.
has records placed randomly throughout the file
uses an index for each key type
Stores records sequentially but uses an index to locate records

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System Analysis and Design
The rule(s) to follow in constructing decision tables is (are):

standardized language must be used consistently.
all of the listed here
a decision should be given a name
the logic of the table is independent of the sequence in which conditions rules are written, but the action takes place in the order is which the events occur.

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