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Microprocessor

Microprocessor
Which one of the following microprocessor has 16-bit data bus?

 6502
 Z-80
 68000
 8085

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Microprocessor
The control flags in 8086 are:

All of these
 the interrupt flag(IF).
 the direction flag(DF).
 the Trap flag(TF).

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Microprocessor
A combinational PLD with a fixed AND array and a programmable OR array is called a

 PROM
 PAL
 PLA
 PLD

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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 microprocessor differentiates between op code, data/address at any time by

 the stack pointer
 its internal registers
 the program counter
 the sequence in which memory contents are fetched by it

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Microprocessor
The number of output pins in 8085 microprocessors are

 19.
 21.
 40.
 27.

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