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Discussion :: Operators and Assignments

  1. Which two are equal?

    1. 32/4
    2. (8 >> 2) << 4
    3. 2^5
    4. 128 >>> 2
    5. 2 >> 5

    2. A.
    1 and 2
    B.
    2 and 4
    C.
    1 and 3
    D.
    2 and 3

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    Answer : Option B

    Explanation :

    (2) and (4) are correct. (2) and (4) both evaluate to 32. (2) is shifting bits right then left using the signed bit shifters >> and <<. (4) is shifting bits using the unsigned operator >>>, but since the beginning number is positive the sign is maintained.

    (1) evaluates to 8, (3) looks like 2 to the 5th power, but ^ is the Exclusive OR operator so (3) evaluates to 7. (5) evaluates to 0 (2 >> 5 is not 2 to the 5th).

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