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Microprocessor

Microprocessor
DMA is used between

 none
 microprocessor and memory
 memory and I/O
 microprocessor and I/O

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Microprocessor
‘Burst refresh’ in DRAM is also called

None of these
Distributed refresh
Hidden refresh
Concentrated refresh

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Microprocessor
Which general register or general register pair is incremented/decremented by 2 during PUSH and POP instructions?

 H-L.
 Program Counter.
 D-E.
 Stack Pointer.

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Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 64.
 16.
 32.
 128.

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Microprocessor
Which of the following instruction is not possible in 8085?

 POP 30 H
 POP D
 POP PSW
 POP B

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Microprocessor
In microprocessor based system DMA refers to

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

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