given an array and int n, return true if exist 2 numbers in the array that their sum is equal to n
Backend Developer Interview Questions
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Given an array of arrays, what is the best way to index in javascript. Write sudo code in the form of a method.
Fiz Bang without using division or modulo
Check for email existence in Mongodb, it is taking too long to check, advise some solution(There are indexes in place and there is no problem in implementation)
Given a binary tree, write a function to check if it is a valid binary search tree (BST).
Some generic leetcode question, I dont even remember it.
What was asked in machine coding round ?
Explain your approach to the task: why did you use the class system that you implemented?
How to implement a DB index for a string field How to implement a DB index for a numeric range (e.g give me all rows with age > 10 and <50 and describe the algorithm to get those rows (including o notation) How to implement an index combining both string field and numeric range
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