Write function to calculate sum of first N powers of 2 starting from 1. You shouldn't use any built-in function for calculating power. Implement the most efficient solution.
Software Developer Net Interview Questions
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Given a value and an array of integers, find if there are two integers in the array that add up to the value.
Write a function atoi in C, which takes a String as input, such as "123", and outputs an int, in this case 123.
How would you reverse a linked list in Java?
Write a program that sees if two binary trees are equal.
Write a program that reverses the words in a sentence.
How would you test if a binary tree were symmetrical and balanced.
Find the longest subsequence in a given array of numbers in O(n)
unlimited supply of coins of different demoninations. pick min number of coins to get given amount.
There are many conference room at Amazon, your manager want you to book a conference room for a meeting. The number of people and time is given. Please return a list of rooms which are available at that time and have enough capacity.
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