Add 2 binary strings , and return sum as string. Design Facebook NewsFeed for android. Given an array of intervals , merge overlapping intervals(code with time and space complexity) Given an array, move all zeros to left(maintain order of elements)-give optimized solution Then 1 coding question(annagramed index)-Given a string and a word, return the index of anagram of word in string if present -(Gave me a nlogk algorithm, then optimized and gave a HashMap solution).
