Microprocessor
In microprocessor based system DMA refers to

 direct memory access for microprocessor
 direct memory access for the user
 direct memory access for the I/O device
None of these

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Microprocessor
Program counter in a digital computer

 Counts the number of times the loops are executed.
 Counts the numbers of programs run in the machine.
 Points the memory address of the next instruction to be fetched.
 Counts the number of times a subroutine is called.

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