System Analysis and Design
In Decision trees

the branch depends on the condition and decisions to made
None of these
the root is drawn on the left and is the starting point on the decision sequence.
All of these
nodes represent the conditions, with the right side of tree listing the actions to be taken

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System Analysis and Design
Direct-access organization

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

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