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Microprocessor

Microprocessor
DMA is used between

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

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Microprocessor
When the write enable input is not asserted, the gated D latch _________ its output.

Complements
Can not change
Clears
Sets

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Microprocessor
While STC instruction executes,

 all flags will be affected.
 only carry and zero flags will be affected.
 no flags will be affected.
 only carry flag will be affected.

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Microprocessor
Total numbers of output pins in 8085 microprocessor are

 40
 13
 27
 30

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Microprocessor
The number of output pins in 8085 microprocessors are

 19.
 40.
 27.
 21.

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Microprocessor
Which one of the following ICs is used to interface keyboard and display?

 8259
 8253
 8279
 8251

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