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Microprocessor

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

 PROM
 PLA
 PAL
 PLD

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Microprocessor
What are the sets of commands in a program which are not translated into machine instructions during assembly process, called?

 Mnemonics
 Directives
 Operands
 Identifiers

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 To latch data D0-D7 from data bus
 To disable data bus
 Enable the data bus to be used as low order address bus
 To achieve all the functions listed above

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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

 1Khz.
 8 Mhz.
 2 Mhz.
 2 Khz.

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

NOR-NAND
OR-NAND
NAND-NAND
NAND-NOR

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Microprocessor
Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier.[Hint: Construct the truth table for the adder and the multiplier]

Circuit A has the same number of gates as circuit B
None of these
Circuit B has more gates than circuit A
Circuit A has more gates than circuit B

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