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Microprocessor

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

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

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Microprocessor
After RESET 8255 will be in

 mode 2
 unchanged condition
 mode 0; all ports are input
 mode 0; all ports are output

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Microprocessor
Consider the following I) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flag. Which one of the above flags is/are present in 8085 microprocessor?

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

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Microprocessor
The data bus of any microprocessor is always

 None
 Either unidirectional or bi-directional
 Bi-directional
 Unidirectional

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

 ORI 0FH
 CMA
 XRI 0FH
 ANI 0FH

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Microprocessor
Which of the following instruction is not possible in 8085?

 POP D
 POP 30 H
 POP PSW
 POP B

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