System Analysis and Design
A couple:

None of these
means that the upper module has the capability of calling the lower module
None of these
is represented by a line joining two modules
is a data item that moves from one module to another

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System Analysis and Design
Indexed-Sequential organization

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

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