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Digital Electronics

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

  255.
  8.
 16.
 256.

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Digital Electronics
When two n-bit binary numbers are added then the sum will contain at most

 (n + 1)-bit
 (n + n)-bit
 n-bit
 (n + 2)-bit

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 1 V and 5 V
 0 V and 5 V
 5 V and 0 V
 –1.5 V and – 0.5 V

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Digital Electronics
Odd parity of a bit stream can be tested using ________ gate.

 XOR
 OR
 NOR
 AND

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Digital Electronics
Switching circuits are

 none of these
 hybrid circuits
 digital circuits
 analog circuits

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Digital Electronics
(44)8 in BCD 8421 code is

 01000100
 01100011
 00100100
 00110110

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