Walmart Data Scientist interview questions

1st round: technical interview, other than below questions, there are also Coding+SQL questions 2nd round: behavioral questions: describe some of your projects, etc. Not sure whether there will be a 3rd round or not

One-hour interview, first part is mainly related to math background in ML, like l2 norm closed form solution, derive loss function in MLP.. Second part is coding challenge over the coderpad, count the number of sub-islands in a graph, number of islands likewise.