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Microprocessor

Microprocessor
Which of the following is type declaration statement in C?

int bar
king = horse + 1
s = s + 1
prin = prin * prin

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Microprocessor
Using one 8259 IC is equivalent to providing …………. INTR pins on 8085

 18
 16
 8
 12

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Microprocessor
S0 and S1 pins are used for

 serial communication
None of these
 acknowledging the interrupt
 indicating the processor’s status

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Microprocessor
While INX B instruction execute,

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

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Microprocessor
While using a frequency counter for measuring frequency, two modes of measurement are possible: Period time Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4MHz, the crossover frequency is given by

 8 Mhz.
 2 Mhz.
 1Khz.
 2 Khz.

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Microprocessor
RST0 - RST7 are the __________ in 8085.

 conditional interrupts
 logical interrupts
 hardware interrupts
 software interrupts

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