Discussion
Bitwise | can be used to multiply a number by powers of 2.
Answer: B
Correct answer: No
Multiplication by a power of two is the left shift's job: n << k multiplies by \( 2^k \).
OR cannot do it, because it only ever sets bits and never moves them. It happens to look like addition when the operands have no bits in common - \( 4 \mathbin{|} 8 = 12 \) is also \( 4 + 8 \) - but that coincidence fails the moment any position overlaps, since there is no carry: \( 3 \mathbin{|} 1 = 3 \) where \( 3 + 1 = 4 \).
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