System Analysis and Design
Conversion method in which users, being used to an old system, continue to use the old system, along with the new system, is

All of these
Parallel run
Multitasking
Multiprocessing
None of these

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System Analysis and Design
Indexed-Sequential organization

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

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