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Microsoft Program Manager Internship Interview Question

I interviewed in Mountain View, CA and was asked:
"Here is a string with duplicate characters in java. Remove the duplicate characters. Return value is a string"
Tags: technical, java
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Part of a Program Manager Internship Interview Review - one of 3,411 Microsoft Interview Reviews

Answers & Comments

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You can use a hashtable for this -- if you find any collisions, (i.e., if hashtable.contains(character at position i in a for loop), then don't add that character to your new string. There are plenty of less-efficient ways to do this, but the hashtable answer is what I used for making it more efficient.

- Interview Candidate on Mar 10, 2011

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