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Digital Electronics

Digital Electronics
If clock time period is 1ms, what is its frequency

 1 kHz
None of these
 1 MHz
 1 mHz

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Digital Electronics
1’s complement of 17 is

 11100.
 10111.
 10001.
  01110.

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Digital Electronics
Excess-3 code is known as

Weighted code
Self-complementing code
Algebraic code
Cyclic redundancy code

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Digital Electronics
What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate?

 three
 four
 one
 two

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Digital Electronics
The logic expression AB can be implemented by giving the inputs A and B to a two-input

 X-OR gate
 NOR gate
 NAND gate
 X-NOR gate

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Digital Electronics
Which of the following is not a transmission medium?

 Telephone lines.
 Microwave systems.
  Modem.
 Coaxial cables.

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