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Self doube in left shift of 2's compment

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P is a 16-bit signed integer. The 2’s complement representation of P is $(E77B)_{16}$. The 2's complement representation of 8×P is?
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Find p from given (-p)   then perform 8*p and takes 2's complement of it ans =3BD8
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ISRO2013-ECE 2s compliment number
The two numbers represented in signed $\text{2s}$ complement form are $\text{P}= 11101101$ and $\text{Q}= 11100110.$ If $\text{Q}$ is subtracted from $\text{P},$ the value obtained in signed $\text{2s}$ complement form is: $1000001111$ $00000111$ $11111001$ $111111001$
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Self doubt- why isn't -ve int converted to 2's complement when storing in unsigned int.
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nitish asked Jan 13, 2016
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Is 2's complement of -57 110001110 ?
Please answer silly but needful question
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