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Microprocessor

Microprocessor
How many 16-bit special purpose registers are present in 8085 microprocessor?

 16
 6
 8
 2

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Microprocessor
A bus connected between the CPU and main memory that permits transfer of information between main memory and the CPU is known as

 Address bus
 Memory bus
 DMA bus
 Control bus

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

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

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Microprocessor
PSW stands for

 accumulator and flag register contents
 flag byte
 none
 accumulator contents

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Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 ANI OFH
 XRI 0FH
 ANI F0H
 XRI FOH

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Microprocessor
Pick up the programmable interrupt controller from the following

 8257
 8279
 8275
 8259

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