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Write a function in C that takes a string, and in-place xors the first char with the last, second with second last, etc., and after the middle part sets the char to 0. Do this efficiently. Is strlen after the function always equal to (strlen before +1)/2? When is it not?
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Senior Software Engineer

Interviewed at Google

4.4
Jan 22, 2014

Write a function in C that takes a string, and in-place xors the first char with the last, second with second last, etc., and after the middle part sets the char to 0. Do this efficiently. Is strlen after the function always equal to (strlen before +1)/2? When is it not?

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