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Digital Electronics

Digital Electronics
The XS-3 code is a

 cyclic code
 self-complementing code
 error-correcting code
 weighted code

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Digital Electronics
Simplified form of the function f = (x+y+xy)(x+z)

 x+xyz
 x+y
 x+yz
 y+xz

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Digital Electronics
Counter is a

  sequential circuit.
  both.
  combinational circuit.
  none.

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Digital Electronics
16’s complement of BABA is?

 4544
 4446
 4445
 4546

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Digital Electronics
How many input and output required for multiplexer ?

 Many input and one output
None of these
 One input and one output
 One input and many output

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Digital Electronics
While using a frequency counter for measuring frequency, two modes of measurement are possible. 1. Period time 2. 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

 1 Khz
 8 Mhz
 2 Mhz
 2 Khz

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