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If an action has been performed and in order to revert it, you have to roll back it.

Ex - A = 2,

B = 3,

C = 0.

Now compute C = A + B.

C = 2 + 3.Which is 5.

So, if you have to roll back then the new value of C will be replaced by its old value i.e. Zero (0).

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13y ago
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Q: What is the meaning of roll back?
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