System Analysis and Design
Indexed-Sequential organization

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

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System Analysis and Design
In Decision trees

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

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System Analysis and Design
The advantage of Purchase Option is (are)

No financing is requird. The risk of system obsolescence is shifted to the lessor
All of these
the flexibility of modifying the system at will
Insurances, maintenance, and other expenses are included in the rental charge
None of these

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