Answer 1

^ is Bitwise XOP and use binary representation.
It give 1 if any one is 1, return 0 if both are 0,1

3 =>0000 0011 (binary)
10 =>0000 1010 (binary)
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0000 1001 = (binary of 9)

https://www.sololearn.com/learn/4074/?ref=app

Answer 2

Yes , you are right vadivelan