System Analysis and Design
A system design is said to be functionally modular if

the system is developed using structured programming through COBOL or PASCAL
the system makes extensive use of function. keys for maximum user assistance
the system is able to handle all the function of the application
None of these
each module performs a specific function and can be developed relatively independently by programmers

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System Analysis and Design
Indexed-Sequential organization

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

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