Find number of ones in an integer.
Software Engineer Data Interview Questions
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Write a function(int[]) -> int that returns the lowest unassigned integer. For example [] -> 1 (empty set), [1] -> 2, [5, 3, 1] -> 2. Basically just sort the array, iterate, and compare current and previous. If there is a gap then that's your number.
If you have an unsorted array of numbers from 1-100, except 1 of those numbers is missing, how do you determine which number is missing
given a list of tuples of movie watched times, find how many unique minutes of the movie did the viewer watch e.g. [(0,15),(10,25)]. The viewer watched 25 minutes of the movie.
Print a binary tree by vertical level order like 1 2 4 3 5 print : 3 2 1 5 4
Given a string find the first non-repeated character.
given an array of numbers to remove the duplicates
The questions were not very difficult but you really need to have all the concepts crystal-clear and be ready to apply them successfully. One of the questions was "how to count the letters in this string:" "The quick brown fox jumps over the lazy dog";
Phone interview question: Given a string pattern of 0s, 1s, and ?s (wildcards), generate all 0-1 strings that match this pattern. e.g. 1?00?101 -> [10000101, 10001101, 11000101, 11001101]. You can generate the strings in any order that suits you.
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