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Microprocessor

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

 PUSH SP
 PUSH PSW
 PUSH A
 POP PSW

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Microprocessor
A microprocessor without the interrupt facility

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

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Microprocessor
In an intel 8085A, which is the first machine cycle of an instruction?

 A memory read cycle
 An op-code fetch cycle
 A memory write cycle
 An I/O read cycle

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Microprocessor
In 8085 microprocessor, in response to RST 7.5 interrupts the execution is transferred to memory location

 0034H
 0000H
 002CH
 003CH

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Microprocessor
During the execution of the instruction, the ________tests the status and control flags and updates them based on the results of executing the instruction.

 Both ‘c’ and ‘d’
 Execution Unit (EU)
 Bus Interface Unit (BIU)
 None of these

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Microprocessor
A number of 1-bit registers used in microprocessors to indicate certain conditions are usually referred to as

 counters
 shift registers
 flags
 latches

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