What do you know about American Express & why do you want to work here?
MISSING VALUE Interview Questions
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Have you ever worked on a dock or had any lift truck experience?
Assume X_i ~ i.i.d. Unif(0,1). What is the expected length of a sequence that is monotonically increasing when drawn from the distribution?
If Google decided to charge g-mail users, how would you recommend implementing this? Would it be sustainable and what would be the advantages and disadvantages?
First, a mathematic question, asking about a card game with how many possible way for the combination based on the rules it given. Second, let you to print out all the combination of 3 digit numbers with no duplicate, ex. 012, 013, ....123, 124, 125...
Implement a class that can calculate the running average of a stream of input numbers up to a maximum of N numbers.
Intersection of n sets without using a hash table.
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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