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Software Engineer Interview Questions
419,567 software engineer interview questions shared by candidates
Find the balance point in an array. (The index where the sum of the elements to the left it is the same as the sum of the elements to the right of it.)
An array contains integers with the property that a particular number, called the majority element, appears more than 50% of the time. Give an algo to find this majority number
Find the minimum number required to insert into a word to make it a palindrome.
Given a string, return the first NON-repeating character that occurs in the string. EX: "adzbdcab" returns 'z'.
Convert a binary search tree to a sorted, circular, doubly-linked list, in place (using the tree nodes as the new list nodes).
given a string with parenthesis, eliminate the illegal parenthesis and return a legal string. for example: "(()" -> "()" ")))(" -> "" "()(()" -> "()()"
Given two sorted input arrays which contain a two element array of [key, value], write a function which multiplies the two arrays together and sums them where the "key" matches. Example: "v1 = [[1, 3], [2, 4], [99, 3]]; v2 = [[2,3],[5,9],[99,1]]" results in "15". I first brute forced it with O(n*m) then used two pointers which resulted in O(n+m) then he asked me to write it in O(n log m). I could not think of an algorithm at the time for O(n log m).
How would you multiply two strings: "123 * "45", without any casting.
Swap two digits from an integer, the result should be the maximum. For example 3580 -> 8350
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