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Microprocessor

Microprocessor
Total numbers of output pins in 8085 microprocessor are

 13
 40
 27
 30

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

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Microprocessor
Which of the data transfer is not possible in microprocessor

 memory to memory
 I/O device to accumulator
 memory to accumulator
 accumulator to memory

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

 DCR R
 ORA R
 XRA R
 DCX Rp

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Microprocessor
Identify the programmable interval timer from the following

 8253
 8275
 8252
 8279

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Microprocessor
Consider the following registers: 1. Accumulator and flag register 2. B and C register 3. D and E register 4. H and L register Which of these 8-bit registers of 8085 microprocessor can be paired together to make a 16-bit register?

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

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