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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 CMA
 ANI 0FH
 ORI 0FH
 XRI 0FH

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Microprocessor
Which of the following interrupt is both level and edge sensitive?

 TRAP
 INTR
 RST 5.5
 RST 7.5

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Microprocessor
In 8085 name/names of the 16 bit registers is/are

 none of these.
 both A and B.
 program counter.
 stack pointer.

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Microprocessor
Which one of the following ICs is used to interface keyboard and display?

 8251
 8279
 8259
 8253

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

OR-NAND
NOR-NAND
NAND-NOR
NAND-NAND

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Microprocessor
Consider the following statements: In 8085 microprocessor, data-bus and address bus are multiplexed in order to I)Increase the speed of microprocessor. II)Reduce the number of pins. III)Connect more peripheral chips. Which of these statements is/are correct?

 (II) & (III)
 (I) only
 (I), (II) & (III)
 (II) only

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