System Analysis and Design
The records in a file on magnetic tape

have to be arranged in a key sequence
are meant for backup
can only be accessed serially
None of these
cannot be transformed to a disk file

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System Analysis and Design
In top down analyis and design

each succeeding phase is as detailed as the phase before it.
each succeeding phase is less detailed than the phase before it
each succeeding phase is more detailed than the phase before it
all of the listed here

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