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Digital Electronics

Digital Electronics
A half adder is a ________ circuit.

 Combinational
 None
 Sequential
 Both A and B

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Digital Electronics
8421 code is

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

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 2’s complement is used to represent the numbers, then the range will be

 -128 to 127
 -128 to 128
 -256 to 255
 -256 to 256

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

 AND
 OR
 NAND
 X-OR

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Digital Electronics
Which of the following is not a transmission medium?

 Coaxial cables.
 Telephone lines.
 Microwave systems.
  Modem.

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Digital Electronics
(11011) 2 in BCD 8421 code is

 11011001
 00011011
 00100111
 01101100

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