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Microprocessor

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

 DCR R
 ORA R
 DCX Rp
 XRA R

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Microprocessor
The number of interrupt lines in 8085 is

4
5
2
3

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Microprocessor
The first microprocessor to include virtual memory in the intel microprocessor family is

 80286
 Pentium
 80386
 80486

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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.

 SIM
 EI
 RIM
 DI

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Microprocessor
In 8085 microprocessor which one of the following statement is wrong

 there is a pin available for serial output
 there is a pin available for serial input
 serial I/O is not possible
 serial I/O is possible through SIM and RIM instruction

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Microprocessor
Which general register or general register pair is incremented/decremented by 2 during PUSH and POP instructions?

 Program Counter.
 Stack Pointer.
 H-L.
 D-E.

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