Interview Cake
At a deep level, your computer works with bits—1s and 0s. But these get bundled up into more human readable things, like characters and lists. This is called abstraction.
While abstractions are nice, sometimes we want to work directly with bits. You can do this with bit manipulation, which involves bitwise operations.
Bitwise operations include AND, OR, XOR, NOT, and Bit Shifts.
AND, for example, takes two bits and returns 1 if both bits are 1. Otherwise, it returns 0. OR returns 1 if either of the bits are 1.
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