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Digital Electronics

Digital Electronics
F’s complement of (2BFD)Hex is

 C403
 D403
 D402
 E304

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

 2m+1
 2m
 2m-1
 2m-1

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Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 0 and 4
 1 and 4
 0 and 3
 1 and 3

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Digital Electronics
In the toggle mode a JK flip-flop has

 J = 1, K = 0.
 J = 1, K = 1.
 J = 0, K = 1.
 J = 0, K = 0.

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Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 3
Base 8
Base 16
Base 10

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Digital Electronics
The codes in which each successive code word differs from the preceding one in only one bit position are called

 self-complementing codes
 sequential codes
 cyclic codes
 BCD codes

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