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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 HOLD.
 All.
 HLDA.
 READY.

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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.
 1Khz.
 2 Khz.
 2 Mhz.

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Microprocessor
A 37 bit mantissa has an accuracy of

11 decimal places
8 decimal places
10 decimal places
6 decimal places

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 all bits set (i.e. FFH)
 all bits reset (i.e. 00H)
 same as the content of A7-A0
 irrelevant

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Microprocessor
In 8085 name/names of the 16 bit registers is/are

 stack pointer.
 none of these.
 program counter.
 both A and B.

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Microprocessor
The word size of 8085 microprocessor is

 8-bit
 16-bit
 20-bit
 4-bit

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MORE MCQ ON Microprocessor

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