# 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?”

### Project Engineering Intern at Disney Parks & Resorts

Oct 29, 2011
 “How many different ways can you get water from a lake at the foot of a mountain, up to the top of the mountain?”

### Intern at Jane Street

Mar 14, 2011
 “If you had only 5 and 11 cent stamps. Whats the smallest number that would be impossible to make with those stamps.”

Dec 9, 2013
 “Find the max value in an array. The array is "semi-sorted". Here is an example: { 1 3 4 7 9 10 12 13 12 6 3 } As you can see, the array increases and then decreases at one point (13).”

### Trader Intern at Jane Street

Jan 12, 2011
 “Russian Roulette - 4 blanks 2 bullets, all in a row. If someone shoots a blank next to you, would you take another shot or spin”

### Prop Trading Summer Intern at Jane Street

Mar 11, 2011
 “You are playing a game where the player gets to draw the number 1-100 out of hat, replace and redraw as many times as they want, with their final number being how many dollars they win from the game...”

### Software Engineering Intern at Facebook

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

### Sales Strat Intern at Goldman Sachs

Mar 17, 2013
 “Suppose we hire you, and you and the rest of the new interns decide to go buy a cup of coffee. Each intern purchases one cup of coffee. One of the interns suggests everyone play a game. Everyone...”

### Summer Trading Intern at Jane Street

Oct 4, 2011
 “Say I take a rubber band and randomly cut it into three pieces. What's the probability that one of the pieces has length greater than 1/2 of the original circumference of the rubber band.”

### Data Scientist Intern at LinkedIn

Feb 25, 2012
 “Find the second largest element in a Binary Search Tree”
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