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Microprocessor

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

 2
 8
 16
 6

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Microprocessor
The minimum number of transistors required to implement a two input AND gate is

8
4
6
2

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Microprocessor
The operating modes of 8255 A are called

Mode 0 and mode 1
Mode 0 and mode 2
Mode 0, mode 1 and mode 2
Mode 0, mode 2 and mode 3

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Microprocessor
Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier.[Hint: Construct the truth table for the adder and the multiplier]

Circuit A has the same number of gates as circuit B
Circuit B has more gates than circuit A
Circuit A has more gates than circuit B
None of these

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Microprocessor
The frequency of the driving network connected between pins 1 and 2 of 8085 microprocessor is

 equal to the desired frequency
 four times the desired frequency
 twice the desired frequency
None of these

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Microprocessor
DMA is used between

 none
 memory and I/O
 microprocessor and memory
 microprocessor and I/O

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