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Microprocessor

Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 ANI OFH
 ANI F0H
 XRI 0FH
 XRI FOH

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Microprocessor
A microprocessor differentiates between op code, data/address at any time by

 the sequence in which memory contents are fetched by it
 the stack pointer
 the program counter
 its internal registers

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Microprocessor
Identify the programmable DMA controller from the following

 8251
 8257
 8279
 8253

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Microprocessor
What is SIM?

 Select interrupt mask.
 None of these.
  Set interrupt mask.
 Sorting interrupt mask.

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Microprocessor
The control flags in 8086 are:

All of these
 the direction flag(DF).
 the interrupt flag(IF).
 the Trap flag(TF).

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Microprocessor
A microprocessor without the interrupt facility

 cannot be used for DMA operation
 is not useful for process control system
 cannot be interfaced with any I/O devices
 is best suited for process control system

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