Developer Intern Interview Questions

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

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

“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…”

“Return the index of the first repeated character of a string.”

“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.”

“To return the 'm' smallest numbers from a file of 'n' numbers”

“Write a program that sees if two binary trees are equal.”

“Linked list memory management: deleting a node from the middle of a list was easy. Next question - how to delete a node from the end of a list. Was too tired to think and realize this was a trick…”

“Write a program to find the square root of a double.”

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“Given the head pointers to two linked lists of unknown length, find the node of intersection if they do intersect.”

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