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Microprocessor

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

 XRI FOH
 XRI 0FH
 ANI OFH
 ANI F0H

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Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

 3 and 4 only
 1, 2 and 3
 1, 2, 3 and 4
 1 and 2 only

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Microprocessor
RST 3 instruction will cause the processor to branch to the location

 0000H
 0024H
 0018H
 0028H

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 RIM
 EI
 DI
 SIM

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Microprocessor
Which of the following instruction will never affect the zero flag?

 DCX Rp
 ORA R
 XRA R
 DCR R

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Microprocessor
Of the following circuits, the one which involves storage is

RS Latch
Mux
Decoder
Nand

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