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Digital Electronics

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

 Telephone lines.
 Coaxial cables.
  Modem.
 Microwave systems.

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Digital Electronics
In Boolean algebra A.A is equal to

 2A
 A²
 1
 A

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Digital Electronics
In SSI, the number of gate circuits per chip is

 < 25
 < 12
 < 6
 < 20

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Digital Electronics
To add two m-bit numbers, the required number of half adder is

 2m+1
 2m-1
 2m-1
 2m

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Digital Electronics
A gate is inhibited when its inhibit input is at logic 1. The gate is

 none of these
 NAND
 OR
 AND

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Digital Electronics
The XS-3 code is a

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

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