Intern Engineering Interview Questions

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“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?”

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

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

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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.”

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

“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…”

“25 racehorses, no stopwatch. 5 tracks. Figure out the top three fastest horses in the fewest number of races.”

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

“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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