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Microprocessor

Microprocessor
Length of the instruction POP D is

 3 byte
 2 byte
 1 byte
 4 byte

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Microprocessor
After RESET 8255 will be in

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

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Microprocessor
Both the ALU and control section of CPU employ which special purpose storage location?

 Accumulators
 Buffers
 Registers
 Decoders

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Microprocessor
The microprocessor may be made to exit from HALT state by asserting

 READY line
 RESTART
 A or B or HOLD line
 any of the five interrupt lines

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

 ORA R
 DCX Rp
 DCR R
 XRA R

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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) only
 (I) ,(III) & (IV)
 (I) & (II)

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