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...”

“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”

“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.”

“Write a function that takes in an array and repeats an integer that appears the most.”

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“Make a program that writes a Binary Search Tree to a file. Now create a program that reads those files and recreates a Binary Search Tree.”

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