Got rejected by Wayfair recently. Wanted to share my experience.

Process:

• OA - 2 DSA questions
  • an n * m maze. Moved from top left to bottom right. Each move you can take upto k steps. Find minimum number of moves.
    • Solution is straight forward BFS.
  • Don't remember the second question, but it was easy.
• Interview - Coding round
  • Q1: Coupons and categories they work on are given. Categories are heirarchial and parent category coupons work for child categories. For a given category find the nearest coupon can than be applied.
  • Q2: Coupons have a datetime. Optimize the algo such that latest datetime coupons wins.
• Interview - Low Level Design
  • The infamous Parking Lot: https://leetcode.com/discuss/interview-question/6003635/WayFair-Automated-Parking-Lot-Problem-Design/
  • I had to draw the class diagrams and the schema design.
  • Got grilled during class diagrams and little time for was left for API design.
• HM & HR Rounds - In person
  • asked about projects, some classic behavioural questions related to conflicts, toughest projects etc

Verdict: Rejected
Feedback:

• I had hadn't given the rounds in Java which was a big no-no. Though, I had asked one of the interviewers whether I had to use Java and they said it isn't a requirement.
• I was also told my combined LLD + HM round was not positive.

It is unfortunate that language played a part in the decision. Imo, no point asking leetcode questions if you want a particular language to be used.