System Analysis and Design
Direct-access organization

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

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

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

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