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Microprocessor

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

 POP PSW
 POP 30 H
 POP D
 POP B

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

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

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

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Microprocessor
A 37 bit mantissa has an accuracy of

11 decimal places
6 decimal places
8 decimal places
10 decimal places

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Microprocessor
The processor status word of 8085 microprocessor has five flags namely:

 S, OV, AC, P, CY
 S, Z, AC, P, OV
 S, Z, AC, P, CY
 S, Z, OV, P, CY

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

 ANI OFH
 XRI 0FH
 XRI FOH
 ANI F0H

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