Timothy Williams

Question

a << 1 is equivalent to

multiplying a  by 2,

dividing a by 2,

adding 2 to a

none

Comments

This is left-shift operation which is equivalent to multiplication of the variable by 2. Note : The left shift and right shift operators should not be used for negative numbers. 

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Shifted 1 bit position towards left.

 

which can also be perceived as multiplying a by 2

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Note that shift operator applied on unsigned numbers, applying them on signed numbers is implementation defined.

a<<2 = multiply by 2, if a*2 is not lead to over flow.

let A = 5 bits and it is unsigned number ===> range = 0 to 2ⁿ-1

if A = 15 ===> A*2 is in the range ===> A << 2 simply as A*2

if A = 16 ===> A*2 is not in the range ====> A << 2 doesn't imply A*2

Answer 1

The left shift operator equivalent to multiply by 2,and right shift operator equivalent to division by 2.

So option (A) is correct.