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Microprocessor

Microprocessor
How many machine cycles are required for execution of IN 30H instruction

 5
 6
 4
 3

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 same as the content of A7-A0
 all bits reset (i.e. 00H)
 irrelevant
 all bits set (i.e. FFH)

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Microprocessor
The number of interrupt lines in 8085 is

2
3
4
5

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Microprocessor
HLT opcode means

  load data to accumulator.
  store result in memory.
  end of program.
  load accumulator with contents of register.

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Microprocessor
How many segments are there in 8086?

 3.
 6.
 4.
 2.

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

 ANI F0H
 XRI FOH
 ANI OFH
 XRI 0FH

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