Totally 3 questions given 90 mins on HackerRank.

1: Efficient Shipping, similar to the question getMaximum Boxes which in roblox problem library
https://leetcode.com/problems/maximum-units-on-a-truck/
Pass all test cases for first question

2: Ancestral, similar to the question Leetcode 13 Roman-to-integer
https://leetcode.com/problems/roman-to-integer/
Pass 8/11 test cases for second question

3: Painting the Cell
https://leetcode.com/discuss/interview-question/892579/paint-the-ceiling-swe-hackerrank-test
Pass 1/11 test cases for thrid question (found there is a logic error for the return function at the end, should set a if statement before return the value)

Not sure if I can pass the OA and get the next round of the interview.