Design 1 : Design recommendation of celebrities to user on Instagram

Design 2 : Design search for Twitter

Coding 1 :
Question 1 : https://www.***.org/find-index-maximum-occurring-element-equal-probability/ O(1) space
Question 2 : https://leetcode.com/problems/range-sum-of-bst/

Coding 2 :
Question 1 : https://www.***.org/find-closest-element-binary-search-tree/
Question 2 : https://leetcode.com/problems/insert-delete-getrandom-o1/

Coding + Bhavior :
Project question
Challenges
Improvements and strenghts
Coding Question : Calculate tax if Salary and Tax Brackets are given as list in the form
[ [10000, 0.3],[20000, 0.2], [30000, 0.1], [null, .1]]
null being rest of the salary