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Digital Electronics

Digital Electronics
The number of comparators in a parallel conversion type 8-bit analog to digital converter is

 256.
  8.
  255.
 16.

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 2’s complement is used to represent the numbers, then the range will be

 -256 to 256
 -128 to 128
 -128 to 127
 -256 to 255

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Digital Electronics
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

TTLAS
TTLLS
CMOS
ECL

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Digital Electronics
Which of the following operations is commutative but not associative?

 OR
 X-OR
 NAND
 AND

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Digital Electronics
A half adder has

 2 inputs and 1 outputs
 1 input and 1 output
 2 inputs and 2 output
 1 input and 2 outputs

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Digital Electronics
X' AND X' will result

 X power 2
 0
 1
 X

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