1. Design a Cab Fare Service where the fare depends upon various factors like demand, weather, and traffic (High-Level Design).
2. Given an n-ary tree, return true if it is a unival tree. A unival tree is a tree in which every node has the same value; otherwise, return false.
3. Design a Rate Limiter.
4. Solve a Data Structures and Algorithms (DSA) problem and discuss the approaches over a Zoom call.