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Microprocessor

Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH PSW
 POP PSW
 PUSH SP
 PUSH A

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Microprocessor
A microprocessor without the interrupt facility

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

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

 0043H
 002CH
 003CH
 0000H

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Microprocessor
SUB A instruction in 8085

 reset carry and sign flags
 reset zero and parity flags
 sets zero and carry flags
 sets zero and sign flags

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Microprocessor
The timing difference between a slow memory and fast processor can be resolved if

Either A or B
External buffer is used
Neither A nor B
Processor is capable of waiting

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

 CLR A
 SUB A
 MOV A, 00H
 ORA A

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