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Microprocessor

Microprocessor
DMA is used between

 microprocessor and I/O
 microprocessor and memory
 none
 memory and I/O

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Microprocessor
The multiplexing of address bus and data buses is used in

 depends on the internal architecture.
 all the microprocessors.
 never multiplexed.
 none of these.

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Microprocessor
DMA signal/signals in 8085 is/are

 HLDA.
 HOLD.
 READY.
 All.

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Microprocessor
I)A total of about one million bytes can be directly addressed by the 8086 microprocessor II)8086 has thirteen 16-bit registers III)8086 has eight flags IV)Compared to 8086, the 80286 provides a higher degree of memory protection Which one of the statements given above are correct?

 2,3&4
 1,2 & 4
 1,3 &4
 1,2 & 3

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Microprocessor
Which of the following is not treated as hexadecimal constant by assembler in 8085?

45 H
234
6 AFH
64 H

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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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