Interview Question

Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right, which minimizes the sum of all numbers along its path.Note: You can only move either down or right at any point ...

Given an array of strings strs, group the anagrams together. You can return the answer in any order.An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original ...

Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.

Given an array nums of n integers, return an array of all the unique quadruplets [nums[a], nums[b], nums[c], nums[d]] such that: 0 <= a, b, c, d < n a, b, c, and d are distinct. nums[a] + nums[b] + nums[c] + nums[d] == target You may return the answer in any order.

Given the head of a linked list, remove the nth node from the end of the list and return its head.

What are the advantages of version control?

Define “Time Series Analysis”

What do you mean by bagging and boosting? What is the key difference in the classifiers involved?

How important is the accuracy on training data vs testing data?

Does k-means converge to a global solution? If yes, can you give the intuition? If not, are there strategies we can use to get better clusters using k-means?