given an array of size 1000 containing only 5 unique elements, which sorting will be the best in this case. Also, how the best sorting algorithm will change as the number of unique elements increases in the array i.e. which sorting algorithm will be the best one as the number of unique elements increases. After that, he asked that given an image with different intensity values how will we detect a face using an algorithm (not ML).

1. What is prototype? 2. What is call, bind,apply? 3. what is promise? 4. Hoisting concept