Typically after how long does the recruiter communicate feedback post the first phone screen round? (SWE, India)

Edit:
Q1: Diameter of binary tree
Q2: Question 2:
You are given a map where key is city and value is population. Write a method that returns a random city but randomness is weighted by population of city. Ex: if NYC is 8M and Dallas is 4M, then method should return NYC twice as much as Dallas.
I think the closest leetcode question is: https://leetcode.com/problems/random-pick-with-weight/