Overall, the interview process was good. The recruiter approached me through LinkedIn.

There was a 30-minute brief call with the recruiter, followed by a 1-hour telephonic phone screen.

The entire day was spent onsite with the team. The onsite interview consisted of 7 rounds.

Serialize and deserialize a binary tree. Further optimize to reduce extra space from the serialized string. Followed up with constructing a BST using a preorder array.

Technical communication on mostly my current experience with Big Data technologies.

Casual lunch with a team member.

Hadoop and Spark related basic questionnaires. Again, going through the architecture diagram of the most challenging project.

Core concepts of Data Warehousing. SQL-based design questions. SCD, star schema, facts, dimensions, etc.

Programming questions on balanced parentheses. Find the median after merging two already sorted arrays.

Behavioral and culture fit round with the hosting manager. Again, going through the current architecture involving Big Data technologies.