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  Interview questions
1 What is NaN?
2 How can you get infinity in Java?
3 How do you check whether your result is infinity?
4 What is a bitmask?
5 Where are bitmasks used?
6 How do you set a bit to 1 in a bitmask?
7 How do you set a bit to 0 in a bitmask?
8 How do you get the value of a specific bit in a bitmask?
9 What is lazy evaluation of an expression?
10 What's the difference between using && and & with booleans?