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Digital Electronics

Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 1:1
 1:2
 2:1
 2:3

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Digital Electronics
What logic function is produced by adding inverters to the inputs of an AND gate?

 NAND
 X-OR
 OR
 NOR

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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.

120 CPS
12 CPS
10 CPS
None of these

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Digital Electronics
The most suitable gate for comparing two bits is

 X-OR
 NAND
 AND
 OR

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Digital Electronics
Which of the following represents (E3)16 ?

 (2BC)16-(1DE)16
 (1BC)16-(DE)16
 (200)16-(11D)16
 (1CE)16+(A2)16

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Digital Electronics
Unit distance code is the other name of

 cyclic code
 self-complementing code
 sequential code
 XS-3 code

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