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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 READY.
 HLDA.
 All.
 HOLD.

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Microprocessor
The processor status word of 8085 microprocessor has five flags namely:

 S, Z, AC, P, OV
 S, OV, AC, P, CY
 S, Z, AC, P, CY
 S, Z, OV, P, CY

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Microprocessor
A microprocessor without the interrupt facility

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

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Microprocessor
The addressing mode in instruction PUSH B is

 register
 immediate
 register indirect
 direct

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is true but R is false
 Both A & R are true but R is not the correct explanation of A
 Both A & R are true and R is the correct explanation of A
 A is false but R is true

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Microprocessor
In microprocessor based system DMA refers to

 direct memory access for microprocessor
 direct memory access for the I/O device
 direct memory access for the user
None of these

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