1. Given a rectangle and a list of tetris (denoted by coordinates), return if these tetris blocks can cover the rectangle 2. Given a transition matrix and a initial probability distribution vector, compute the stable probability distribution vector 3. Given lines of strings, aggregate valid words and then count the frequency of each word and frequency of letters

There are 5 -10 probability multiple choices. You need to finish each within 1min limit. The interview requires camera on. I remember one is requirement for diagonalizable matrices. Coin’s probabilities….