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Developer Intern Interview Questions

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About the details, and interviewer will communicate with you when you are typing.

3 Answers

Reverse a linked list.

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Write a function that returns the depth of a tree.

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One of the software engineers asked me the question about the colored chameleons bonking into each other question. Basically, there are 15 red, 17 green, and 19 blue chameleons on a desert island. Whenever two chameleons of different colors collide, they both become chameleons of the third color. Can it ever be that all the chameleons on the island are the same color?

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Write a program that verifies that a binary tree is a binary search tree.

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Given an array of integers, all but one of which appears an even number of times, find the one integer which appears an odd number of times. Upon completion, asked to improve the algorithm in terms of both time and space, eventually asked to do it in O(n) time and constant space.

4 Answers

Give me 5 different ways of finding the median (middle element) of a linked list. For the sake of simplicity, assume the list has odd number of ints. Also mention the runtime for each. Follow up: What's the fastest way you could find the median? What is the runtime? Oh.. and yes, code your answer(s) in any language of your preference.

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Find the maximum subset sum in an array of numbers. Discuss complexity.

3 Answers

Print the BST in level order

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in an array of characters find the character that is repeated the most

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