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Microprocessor

Microprocessor
In C the keywords are also called

Class words
Special words
Character words
Reserved words

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Microprocessor
While STC instruction executes,

 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
The number of hardware interrupts present in 8085 microprocessor are

 10
 8
 16
 5

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is true but R is false
 A is false but R is true
 Both A & R are true and R is the correct explanation of A
 Both A & R are true but R is not the correct explanation of A

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Microprocessor
Which of the data transfer is not possible in microprocessor

 memory to memory
 memory to accumulator
 accumulator to memory
 I/O device to accumulator

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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

 2 Khz.
 1Khz.
 8 Mhz.
 2 Mhz.

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