Q1. https://leetcode.com/problems/binary-tree-right-side-view/description/

Explained a BFS-based approach, which the interviewer was fine with and asked me to write the code.

After that, as a follow-up, asked me if this can be done using DFS. Asked me to write code for that as well.

Q2. Add two numbers (in string format, could be very big numbers), contains decimal as well (For e.g. 99.898 + 7.6). No (-) or (+) characters in the input, only digits and decimal.