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Digital Electronics

Digital Electronics
2-out-of-5 code is

 non-weighted code
 alphanumeric code
 weighted code
 self-complementing code

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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.

None of these
120 CPS
10 CPS
12 CPS

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Digital Electronics
Which of the following operations is commutative but not associative?

 AND
 NAND
 X-OR
 OR

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Digital Electronics
An AND gate can be imagined as

 transistors connected in series
 switches connected in parallel
 switches connected in series
 transistors connected in paralle

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Digital Electronics
The number A = 01110000 and B = 10101111 are in 2’s complement form .Addition of above two number is

 11100000
 10101111
 011100001
 00011111

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Digital Electronics
In an SR latch built from NOR gates, which condition is not allowed

 S=0, R=0
 S=1, R=0
 S=1, R=1
 S=0, R=1

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