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Digital Electronics

Digital Electronics
The XS-3 code is a

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

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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

 2 Khz
 8 Mhz
 2 Mhz
 1 Khz

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Digital Electronics
The number of cells in a 6 variable K-map is

 36
 64
 12
 6

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Digital Electronics
The NAND gate can function as a NOT gate if

 one input is set to 1
 one input is set to 0
 all inputs are connected together
 inputs are left open

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Digital Electronics
When will be the output of a NOT gate is HIGH ?

None of these
 the input is HIGH and LOW
 the input is LOW
 the input is HIGH

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Digital Electronics
For a code to be self-complementing, the sum of all its weights must be

 10
 6
 9
 12

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