It was a newsvender problem formulated to their inventory setting
Operations Research Scientist Interview Questions
80 operations research scientist interview questions shared by candidates
Google what they did, what they are doing, and what they plan to do, and think about if there is any research topics related to those. It would help a lot. By the way, even if you are doing optimization, logistics/transportation/supply chain type of research, still, get some ideas about machine learning, data mining, analytics-type of stuff, it would help.
Case Studies related to designing supply chain
LP and ILP based modelling questions. General SQL, R skills. Some ML/ Time-series based core questions.
What is MIP gap? Describe some methods for NLP problems.
Casual discussion about my past research projects and current projects at the company
Optimization methods developed and applied.
What kind of models will you pick to build an ensemble models. If the task is multi-labels, is the result still work?
Suppose that a network G = (N, A) contains no negative cycle. In this network, let fij denote the maximum amount by which we can decrease the length of arc (i, j) without creating any negative cycle, assuming all other arc lengths are held constant. Describe an efficient algorithm for determining fij for each arc (i, j).
Questions were off the subject for an operations research positions. Looked liked they had no idea of what they are looking for.
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