# Software Development Engineer Interview Questions

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### Software Development Engineer at Amazon.com

Dec 9, 2011
 “Write an algorithm to determine if 2 linked lists intersect”

### Software Development Engineer at Amazon.com

Oct 15, 2009
 “Find the deepest common ancestor of two nodes in a tree structure.”

### Software Development Engineer In Test at Google

Oct 1, 2009
 “The Game of Nim worded diffently.”

### Software Development Engineer at Amazon.com

Jun 8, 2009
 “Number of 1's in binary representation of integer?”

### Software Development Engineer In Test at Amazon.com

Dec 6, 2012
 “Most of them were expected. Almost all are problem solving questions. 1. Given a BST with following property find the LCA of two given nodes. Property : All children has information about their...”

### Software Development Engineer at Amazon.com

Feb 27, 2010
 “Implement a function to validate whether a given binary tree is a BST (i.e. write an isBST() function).”

### Software Development Engineer In Test (SDET) at Microsoft

Mar 16, 2011
 “Given a set of numbers -50 to 50, find all pairs that add up to a certain sum that is passed in. What's the O notation for what you just wrote? Can you make it faster? Can you find an O(n...”

### Software Development Engineer II at Amazon.com

Mar 19, 2009
 “Determine whether the binary representation of a number if a palindrome or not, code it on a white board.”

### Software Development Engineer at Amazon.com

Jun 24, 2010
 “List all anagrams in a file. Assumptions: case-insensitive, a-z characters only, one word per line. For example, if the file contains dog, cat, ddd, goo, act, god -- output dog, god, act, cat”

### Software Development Engineer Intern at Microsoft

Aug 13, 2013
 “Determine if an array from 1..n has a duplicate in constant time and space.”
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