Walmart Software Engineer Backend interview questions

peeformance questions on service: Explain a time you optimized a backend service for performance or scalability. What was the issue and how did you resolve it?” How do you ensure resilience and fault tolerance in your services

Applied via job portal(Naukri), got a call 3 days back. HR introduced about walmart labs, and the role. Asked about my experience and scheduled the interview on the immediate Saturday. Interview Process: Was call for interview at 11:30 AM and the was told to wait, after 15 mins was call for a F2F interview. Round 1: F2F Interview Main topics were Data Structures, Algorithms and problem solving of them. Duration: 1hour 30 mins. Was told to write on paper and explain (Question I will share) Waited for 10-15mins and was told you are selected for next round Lunch was provided Round 2: Design & Problem Solving Duration: 1hour 30 mins Wait 5-10 mins and was told to leave Tip: Prepare well for DS and algo so that you can reproduce on paper