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Goldman Sachs New Associate Programmer Analyst Interview Question (student candidate)

I interviewed in Salt Lake City, UT and was asked:
"Implement an intersection method for two lists. After showing a brute force method, I was asked to improve upon the method and analyze time complexity for both algorithms."
Tags: algorithm
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Part of a New Associate Programmer Analyst Interview Review - one of 1,566 Goldman Sachs Interview Reviews

Answers & Comments

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1. Traverse through the first list and put all items in a hash table.
2. Traverse through the second list and try to find these items in the hash table created in step 1 -> Add all items found to the intersection list.

O(N) complexity.
- Vinod on Nov 19, 2012

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