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Microprocessor

Microprocessor
How many T-states are required for execution of OUT 80H instruction?

 10
 16
 13
 7

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Microprocessor
Total numbers of output pins in 8085 microprocessor are

 13
 30
 27
 40

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Microprocessor
PSW stands for

 none
 accumulator and flag register contents
 accumulator contents
 flag byte

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Microprocessor
Identify the non-programmable interfacing device from the following

 8255.
 8257.
 8212.
 8295.

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Microprocessor
A sequence of two registers that multiplies the content of DE register pair by two and stores the result in HL register pair (in 8085 assembly language) is

 XCHG & DAD B
 XCHG & DAD H
 PCHL & DAD D
 XTHL & DAD H

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Microprocessor
The timing difference between a slow memory and fast processor can be resolved if

Either A or B
Processor is capable of waiting
External buffer is used
Neither A nor B

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