# Software Intern Interview Questions

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### Software Engineer Intern at Goldman Sachs

Jul 28, 2009
 “Suppose you had eight identical balls. One of them is slightly heavier and you are given a balance scale . What's the fewest number of times you have to use the scale to find the heavier ball?”

### Software Engineering Intern at Facebook

Feb 7, 2011
 “Implement a power function to raise a double to an int power, including negative powers.”

### Software Development Engineer Intern at Amazon.com

Feb 15, 2012
 “To find and return the common node of two linked lists merged into a 'Y' shape.”

### Software Development Engineer Intern at Microsoft

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

### Financial Software Developer Intern at Bloomberg L.P.

Apr 17, 2012
 “There are 20 floors in a building. If you're on an elevator and you're trying to get to the 20th floor, what is the probability that 4 people ahead of you click the 20th floor before you do? Assuming...”

### Software Engineer Intern at Facebook

Oct 1, 2013
 “Given two strings representing integer numbers ("123" , "30") return a string representing the sum of the two numbers ("153")”

### Software Engineering Intern at Google

Oct 14, 2011
 “how would you find the shortest path between two nodes in a social network?”

### Software Engineer Intern at Facebook

Sep 21, 2011
 “Generate a new array from an array of numbers. Start from the beginning. Put the number of some number first, and then that number. For example, from array 1, 1, 2, 3, 3, 1 You should get...”

### Software Engineering Intern at Facebook

Mar 8, 2012
 “Given a sorted array, write a program to decide if two elements sum up to a third.”

### Software Development Engineering Intern at Amazon.com

Jun 23, 2012
 “You are given an array with n positive integers where all values in the array are repeated except for one. Return the one that is not repeated.”
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