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Microprocessor

Microprocessor
The number of status flags present in 8085 microprocessor are

 10
 16
 5
 8

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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
 RIM
 DI
 EI

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Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

 1, 2, 3 and 4
 1 and 2 only
 1, 2 and 3
 3 and 4 only

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Microprocessor
RST0 - RST7 are the __________ in 8085.

 software interrupts
 logical interrupts
 conditional interrupts
 hardware interrupts

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 ORA A
 MOV A, 00H
 CLR A
 SUB A

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Microprocessor
The execution of RST n instruction causes the stack pointer to

 decrement by two
 increment by two
None of these
 remain unaffected

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