Background:
YEO : 5
I applied through their careers page and received a call month after that in September. The recruiter told me that they have an urgent opening.
1. Take home coding round
September last week
It was conducted on HackerRank or HackerEarth. Don't remember exaclty.
Input: [[1,2,3], [2,4,5], ....]
There is a tree structure given in format of [Parent, left child, right child]. Find weather it is valid Binary Search Tree or not. If it is, return the root node of the tree.
Recruiter reached out to me after couple of days and onsite 2 coding rounds were scheduled for the next week. After many re-schedules from the interviewers side, it happened on 1st week of October
2. First Round
Standard Target sum, but all values were double. The Target sum and the coins values as well. Also the question was framed in some kind of story, but took hardly 5 mins to find that it is target sum problem.
3. Second Round
https://leetcode.com/problems/maximum-profit-in-job-scheduling/
Received feedback for this next week(2nd week), as the second round was done on Friday and next rounds were scheduled for 3rd week of October. For this also, there was lot of re-scheduling from their side.
4. Past Experience Round
Their was a expressionless senior guy, who asked all about past work. Didn't ask to draw anything (the architecture).
5. System Design Round
Design Group messaging Service. He mostly focused on DB and the entitites which I'll store. I gave solution similar to this:
https://bytebytego.com/courses/system-design-interview/design-a-chat-system
After a couple of days of silence, received positive feedback for all the previous rounds. Than they scheduled 2 core value rounds.
6. Core Values Rounds (1 & 2, 30 mins each)
- Why Airbnb?
- Have you ever helped someone who felt not beloging to the group? Why did you help that person (I was like arrrghhhh, who asks why did i help?)
- Future goals, etc...
Both these rounds were conducted by Singapore panel. In second round, the questions were getting repeated, which i pointed out to my interviewer. She gave me a poker face and said ki she still wants to know the answer.
Feedback: Duhhh, 1 positive and 1 negative. They said, i gave professional experience based examples and they want to know my person life. Recruiter pushed me to give 3rd core value round, since I had got positive feedback for all tech rounds.
7. Core Values (3rd)
This was taken by an experienced Indian guy. He talked about my previous Core value rounds. It was very chill. Felt like talking to a friend.
Final feedback: Positive.
Super slow process.