System Analysis and Design
Sequential organization

means storing records in contiguous blocks according to a key.
Stores records sequentially but uses an index to locate records
None of these
has records placed randomly throughout the file
uses an index for each key type

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System Analysis and Design
Top-down programming is

a series or group of components that perform one or more operations of a more complex system
a map of the programmer's view of the data
an approach in which the top module is first tested then program modules are added from the highest level to the lowest level
a group of related fields

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System Analysis and Design
Direct-access organization

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

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