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Microprocessor

Microprocessor
In a microprocessor based system the stack is always in

 RAM
 microprocessor
 EPROM
 ROM

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Microprocessor
In order to complement the lower nibble of accumulator one can use

 CMA
 ORI 0FH
 XRI 0FH
 ANI 0FH

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Microprocessor
When an 8085 microprocessor is reset, the address bus contains

 0043H
 003CH
 0000H
 002CH

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 MOV A, 00H
 ORA A
 SUB A
 CLR A

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Microprocessor
The operating modes of 8255 A are called

Mode 0 and mode 2
Mode 0, mode 2 and mode 3
Mode 0 and mode 1
Mode 0, mode 1 and mode 2

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Microprocessor
Bus Interface Unit (BIU) in 8086 performs the following functions:

 Instruction decoding.
 Arithmatic and Logic operations.
 All the above.
 Instruction fetch.

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MORE MCQ ON Microprocessor

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