Gayle Laakmann's CareerCup: 150 Questions with 120 Solutions (For Software PDF

By Gayle Laakmann

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Additional resources for CareerCup: 150 Questions with 120 Solutions (For Software Engineers and SDETs)

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Given any two words, find the shortest distance (in terms of number of words) between them in the file. Can you make the searching operation in O (1) time? What about the space complexity for your solution? id=2596 Question Eleven SOLUTION Write a program to find the longest word made of other words. EXAMPLE: Input: test, tester, testertest, testing, testingtester Output (longest word): testingtester . id=2705 Tricky Classic Favorite © 2009 CareerCup Testing Testing Problems: Not Just for Testers!

String sentence = ‚‛; foreach (string w in words) { sentence = sentence + word; } Answer: O(n^2), where n is the number of letters in sentence. Here’s why: each time you append a string to sentence, you’re actually creating a copy of sentence and running through all the letters in sentence to copy them over. If you have to run through up to n characters each time in the loop, and you’re looping at least n times, that gives you an O(n) run time. Ouch! How do you avoid this problem? String buffers!

3}, {4, 5, 6}}; Java int[] x = new int[4]; int[][] x = new int[2][3]; © 2009 CareerCup Matrix Question One SOLUTION Write an algorithm such that if an element in an MxN matrix is 0, its entire row and column is set to 0. id=2852 Question Two SOLUTION Given an image represented by a matrix, where each pixel in the image is 4 bytes, write a method to rotate the image by 90 degrees. Can you do this in place? id=1458 Question Three SOLUTION Given a matrix in which each row and each column is sorted, write a method to find an element in it.

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CareerCup: 150 Questions with 120 Solutions (For Software Engineers and SDETs) by Gayle Laakmann


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