Intersection of n sets without using a hash table.
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Get numeric number out of a roman string, linear time Given: mapping I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000 Input/Output: II = 2, III = 3, IV = 4 VI, VII, VIII IX = 9 XL = 40, XLIX = 49
The initial question (writing a function to calculate a square root) ended up being the most difficult because it threw me off. I knew there was a good iterative method for doing so, but could not recall Newton's method in the moment, and I sadly let this nagging thought get in the way of my ability to work through the problem. My failure to perform well on that question set a negative tone for the rest of the interview, since each interviewer after the first can see notes from the previous interviewers.
Getting maximum and minimun number was not difficult but getting less than n comparison was tricky.
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Interviewer ask me to solve some permutation related problems. 1) Algorithm to get Index of a permutation when all permutations arranged in lexicographical order and its complexity
You have a 64bit interger counter set to 0. How long it will take to overflow the counter given that you are incrementing it at 4Ghz speed.
integer partiontioing given N (a integer) how many ways you can write as N summation of other numbers 5 = 1+ 2 +2 = 2+ 2 + 1 = 1 + 3 +1 = 1 + 4 etc.. write C code to print every combination
Given an unsorted array of integers, find first two numbers in the array that equal a given sum.
Given a page size and a number, align the number with the nearest page. (Note: This was a phone interview question. The interviewer and I used an online document to share ideas about this problem.
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