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How would you efficiently store a million strings in a data structure so that you would give suggestions if a part of word is typed? For eg: let there be 5 words cat, ball, basket,banana,bench. If I type b it should suggest me ball,basket,banana,bench If I type ba it should suggest me ball,basket,banana If I type ban it should suggest me banana .......................... You should show how you store the data, how you then retrieve them to give user a proper suggestion and do this efficiently. It's exactly same as the dictionary app we use. The other 2 questions were also challenging. One was some sorting question that I don't remember but it was an easy one and the other was to how would I structure a TreeMap in java assuming that it doesn't exist in the Collections library.
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Amazon Software Engineer

Interviewed at Amazon

3.5★
Jun 22, 2013

How would you efficiently store a million strings in a data structure so that you would give suggestions if a part of word is typed? For eg: let there be 5 words cat, ball, basket,banana,bench. If I type b it should suggest me ball,basket,banana,bench If I type ba it should suggest me ball,basket,banana If I type ban it should suggest me banana .......................... You should show how you store the data, how you then retrieve them to give user a proper suggestion and do this efficiently. It's exactly same as the dictionary app we use. The other 2 questions were also challenging. One was some sorting question that I don't remember but it was an easy one and the other was to how would I structure a TreeMap in java assuming that it doesn't exist in the Collections library.

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