I attended Grab OA/Interviews in Oct/Nov 2021. I had 2.3 yoe at the time of interview and I applied for Software Engineer, Backend.

Round 1: Problem Solving and DSA

1. Merge two binary trees
2. Maximum subarray sum
3. ZigZag tree traversal

Round 2: Design and Coding

1. A variation of LC1041
2. Implement a DS that supports all (i) append(val), (ii) get_at_index(i), (iii) add_to_all_elements(val) in O(1)

Round 3: Bar Raiser LLD

1. Design a ditributed job scheduler

Round 4: Hiring Manger: Resume grill, Past work experience, Challenges faced in the current project, What is my routine in wfh life, which do you prefer. Which technologies you want to work on in future. What is that you like/don't like in your manager, Most difficult aspect of the current project etc

I think i screwed up in the HM round. Was rejected the next day