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You have 10 boxes of balls (each ball weighing exactly10 gm) with one box with defective balls (each one of the defective balls weigh 9 gm). You are given an electronic weighing machine and only one chance at it. How will find out which box has the defective balls?
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Senior Software Engineer

Interviewed at Oracle

3.5
Mar 5, 2013

You have 10 boxes of balls (each ball weighing exactly10 gm) with one box with defective balls (each one of the defective balls weigh 9 gm). You are given an electronic weighing machine and only one chance at it. How will find out which box has the defective balls?

Given any number of arrays containing numbers, write a function which finds the numbers that appear in exactly two arrays. arrays = [ [6, 2, 2, 0, 4], [5, 0, 2, 6, 7, 1], [6, 7, 9, 9], ] find_in_two(arrays) should return [2, 0, 7]
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Software Developer

Interviewed at Booking.com

4.1
Jun 20, 2016

Given any number of arrays containing numbers, write a function which finds the numbers that appear in exactly two arrays. arrays = [ [6, 2, 2, 0, 4], [5, 0, 2, 6, 7, 1], [6, 7, 9, 9], ] find_in_two(arrays) should return [2, 0, 7]

input log = [ { 'user': 'A', 'page': 1}, { 'user': 'B', 'page': 5}, { 'user': 'A', 'page': 2}, { 'user': 'A', 'page': 1}, { 'user': 'B', 'page': 2}, { 'user': 'C', 'page': 7}, { 'user': 'C', 'page': 3}, { 'user': 'A', 'page': 3}, { 'user': 'C', 'page': 1}, ] please implement discover_site_map(log) discover_site_map returns a representation of the links between pages, using whatever data structure you think is suitable: 1 -> 2, 3 2 -> 1 3 -> 1 5 -> 2 7 -> 3
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Software Developer

Interviewed at Booking.com

4.1
Jun 20, 2016

input log = [ { 'user': 'A', 'page': 1}, { 'user': 'B', 'page': 5}, { 'user': 'A', 'page': 2}, { 'user': 'A', 'page': 1}, { 'user': 'B', 'page': 2}, { 'user': 'C', 'page': 7}, { 'user': 'C', 'page': 3}, { 'user': 'A', 'page': 3}, { 'user': 'C', 'page': 1}, ] please implement discover_site_map(log) discover_site_map returns a representation of the links between pages, using whatever data structure you think is suitable: 1 -> 2, 3 2 -> 1 3 -> 1 5 -> 2 7 -> 3

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