I was contacted in October 2017 and interviewed at the beginning of November 2017. The interview was easy, but I still got denied. They asked Big O questions, questions about my resume, and string and array manipulation questions. It was nothing too hard. Know about your strings, arrays, algorithms, data structures, etc. Be prepared, do your best, and keep pushing. Don't let denial get you down; just continue to keep pushing and try again next year. Don't make Google the only company you're pursuing. I would advise having other options.

Suppose you have an array of strings. If there is a duplicate in the array, erase it.

Suppose you have two strings. Iterate through each string until one string's character does not match the other's, then return that character.

EX: "fff", "fffb" ----> Return b