Optum Sr Software Engineer interview questions

Got a call through naukri. 4 rounds of interview. R1 : Coding R2 : Coding R3 : Big Data Design Problem R4 : Managerial All of them were simple. I didn't have much big data design experience. All rounds had basic programming and Java theory. R3 had a lot of big data design and Spark SQL and many big data concepts.

Went through a recruiter to interview at Optum. The interview process consisted of 2 parts: 1) Screening with hiring manager and a developer lead 2) Interview Panel which was about 3 hours long with 3 different employees. 2.1. System Architecture Design 2.2. Culture Fit and Technical Background Knowledge 2.3. Two coding technical questions