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      Senior Data Scientist - Optimization Interview

      13 Dec 2022
      Anonymous interview candidate
      No offer
      Negative experience
      Average interview

      Application

      I applied online. The process took 3 weeks. I interviewed at C3 AI in Dec 2022

      Interview

      I got a HackerRank test invitation email with no details on the due date of this test or what kind of questions would be asked: whether it was going to have data science related questions or coding questions. I did not get any email from a recruiter to reach out either. The Hacker Rank test had several issues: formatting issues with questions, incorrect question, all multiple choices offered for a question were wrong, etc. Questions were multiple choice; one coding question

      Interview questions [9]

      Question 1

      Is the inverse of a symmetric matrix symmetric?
      1 Answer

      Question 2

      If a feasible primal max problem is unbounded, then what can you say about the dual?
      1 Answer

      Question 3

      Which of the options represented a line segment connecting (-1, -1) to (1, 1)?
      1 Answer

      Question 4

      f(x) = ax + by; a, b are real. S = {(x, y} \in R^2| x+y=2, x>=0, y>=0}. Choose the correct option.
      1 Answer

      Question 5

      Newton's method: f(x) = x^2. What's x after the second iteration of Newton's method when solving for the roots of f(x)?
      1 Answer

      Question 6

      Categorizing an optimization problem: min_{x, y} 1^T y s.t. x - My <= 0; c^T x > 100; x<24; x is real 10-dimensional; y is binary 10-dimensional Select all that is true: a> Convex b> MIP c> quadratic d> Can be solved using simplex
      1 Answer

      Question 7

      What happens when you add a completely random feature into a linear regression model?
      1 Answer

      Question 8

      A question based on conditional probability formula: Which of these specify the input sufficient to calculate the conditional probability P(H|e_1, e_2)?
      1 Answer

      Question 9

      Coding question: string input, you can remove all but one instance of a character from the string. Return the Lexicographically maximal string
      Answer question

      Other Senior Data Scientist - Optimization interview reviews for C3 AI

      Senior Data Scientist - Optimization Interview

      13 Dec 2025
      Anonymous interview candidate
      No offer
      Negative experience
      Easy interview

      Application

      I interviewed at C3 AI

      Interview

      4 interviews first one behavioral other 3 technical (1 coding - 2 theory) very unorganazed **** there was some topics suggested in their website to be ready to answer but the coding question was on a subject that was not related

      Interview questions [1]

      Question 1

      2d knapsack coding basics of optimizition and MDPs
      Answer question

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