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Digital Electronics

Digital Electronics
An OR gate has 6 inputs. The number of input words in its truth table are

6
128
64
32

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

 12
 10
 9
 6

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Digital Electronics
What logic function is produced by adding an inverter to each input and output of an AND gate?

 NOR
 NAND
 X-OR
 OR

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Digital Electronics
The maximum positive and negative numbers that can be represented in one’s complement using n-bits are respectively

 +2n-1,-(2n-1-1)
 +(2n-1-1),-(2n-1-1)
 None of these
 +(2n-1-1),-2n-1

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Digital Electronics
Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is.

10 CPS
12 CPS
None of these
120 CPS

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Digital Electronics
An 8 × 4 ROM contains a decoder of size

 3 × 8
 8 × 4
 3 × 4
 8 × 8

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