Digital Electronics
2421 code is

 weighted non-self-complementing code
 non-weighted self-complementing code
 non-weighted and non-self-complementing code
 weighted self-complementing code

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Digital Electronics
Consider the representation of six-bit numbers by two’s complement, one’s complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000?

Sign and magnitude and one’s complement only
Two’s complement and one’s complement only
All three representations
Two’s complement only

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