Intern Software Engineer Interview Questions

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Let's say a triple (a, b, c) is a zigzag if either a < b > c or a > b < c. Given an array of integers numbers, your task is to check all the triples of its consecutive elements for being a zigzag. More formally, your task is to construct an array of length numbers.length - 2, where the ith element of the output array equals 1 if the triple (numbers[i], numbers[i + 1], numbers[i + 2]) is a zigzag, and 0 otherwise. Example • For numbers = [1, 2, 1, 3, 4], the output should be solution(numbers) = [1, 1, 0]. o (numbers[0], numbers[1], numbers[2]) = (1, 2, 1) is a zigzag, because 1 < 2 > 1; o (numbers[1], numbers[2] , numbers[3]) = (2, 1, 3) is a zigzag, because 2 > 1 < 3; o (numbers[2], numbers[3] , numbers[4]) = (1, 3, 4) is not a zigzag, because 1 < 3 < 4; • For numbers = [1, 2, 3, 4], the output should be solution(numbers) = [0, 0]; Since all the elements of numbers are increasing, there are no zigzags. • For numbers = [1000000000, 1000000000, 1000000000], the output should be solution(numbers) = [0]. Since all the elements of numbers are the same, there are no zigzags.
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Software Developer Intern

Interviewed at Robinhood

3.6
Sep 18, 2024

Let's say a triple (a, b, c) is a zigzag if either a < b > c or a > b < c. Given an array of integers numbers, your task is to check all the triples of its consecutive elements for being a zigzag. More formally, your task is to construct an array of length numbers.length - 2, where the ith element of the output array equals 1 if the triple (numbers[i], numbers[i + 1], numbers[i + 2]) is a zigzag, and 0 otherwise. Example • For numbers = [1, 2, 1, 3, 4], the output should be solution(numbers) = [1, 1, 0]. o (numbers[0], numbers[1], numbers[2]) = (1, 2, 1) is a zigzag, because 1 < 2 > 1; o (numbers[1], numbers[2] , numbers[3]) = (2, 1, 3) is a zigzag, because 2 > 1 < 3; o (numbers[2], numbers[3] , numbers[4]) = (1, 3, 4) is not a zigzag, because 1 < 3 < 4; • For numbers = [1, 2, 3, 4], the output should be solution(numbers) = [0, 0]; Since all the elements of numbers are increasing, there are no zigzags. • For numbers = [1000000000, 1000000000, 1000000000], the output should be solution(numbers) = [0]. Since all the elements of numbers are the same, there are no zigzags.

Nothing difficult. The first question is about combination of HashMap and ArrayList, which the best answer should be LinkedHashMap but it's OK if you didn't know about this class. The second interview is to find the same element in two lists
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Software Engineer Intern

Interviewed at Tripadvisor

3.5
Mar 13, 2014

Nothing difficult. The first question is about combination of HashMap and ArrayList, which the best answer should be LinkedHashMap but it's OK if you didn't know about this class. The second interview is to find the same element in two lists

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