His binary number is:

00000 100 |0000 1000 = 0000 1 100

**********************************************

000000001| 0000001= 0000001When performing bitwise OR operation; 0000000 1|00000000= 1 ; 00000000|00000000=00000000

That is to say, except 0|0, the result of other operations is 1.

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PS: Please help me step on my space when you are free. Thank you.