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Microprocessor

Microprocessor
What is the size (in bytes) of Prefetch queue in 8086?

 4.
 6.
 2.
 3.

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 EI
 SIM
 RIM
 DI

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Microprocessor
The multiplexing of address bus and data buses is used in

 none of these.
 depends on the internal architecture.
 all the microprocessors.
 never multiplexed.

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Microprocessor
DMA is used between

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

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

 POP B
 POP D
 POP PSW
 POP 30 H

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Microprocessor
A mask programmed ROM is

 erasable and programmable
 erasable electrically
 programmed by the user
 programmed at the time of fabrication

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