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Digital Electronics

Digital Electronics
Which number system has a base of 16

 Octal
 Hexadecimal
 Decimal
 None

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Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 X-NOR
 X-OR
 AND
 OR

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Digital Electronics
Simplified form of the function f = (x+y+xy)(x+z)

 x+xyz
 y+xz
 x+y
 x+yz

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Digital Electronics
A D-flip-flop is said to be transparent when

 the output is LOW
 the output is HIGH
 the output follow input
 the output follows clock

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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 momentary change in the output/state of the flip-flops is known as

 inverter
 unstable state
 trigger
 tri-state

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