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Microprocessor

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

 16
 6
 2
 8

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

 8259
 8251
 8279
 8253

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

 ANI OFH
 XRI FOH
 XRI 0FH
 ANI F0H

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Microprocessor
We say that a set of gates is logically complete if we can build any circuit without using any other kind of gates. Which of the following sets are logically complete

Set of {EXOR, NOT}
Set of {AND,OR}
Set of {AND,OR,NOT}
None of these

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Microprocessor
In 8085 which addressing mode is also called inherent addressing?

Immediate
Register
Direct
Implicit

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Microprocessor
PSW stands for

 none
 accumulator contents
 accumulator and flag register contents
 flag byte

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