System Analysis and Design
The term scheme means

the relationship service bureau
two dimensional table
a parent with no owners
None of these
a map of overall structure of a database.

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System Analysis and Design
Inverted list organization

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

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System Analysis and Design
In a Decision tree

the root is drawn on the left and is the starting point on the decision sequence
the branch, to be followed, depends on the conditions and decisions, to be made
all of the listed here
the nodes represent the conditions, with the right wise of tree listing the actions to be taken

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