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
Multitasking
Multiprocessing
Parallel run
None of these

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System Analysis and Design
Top-down programming is

a group of related fields
an approach in which the top module is first tested then program modules are added from the highest level to the lowest level
a series or group of components that perform one or more operations of a more complex system
a map of the programmer's view of the data

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