LexisNexis Risk Solutions Fraud Data Analyst interview questions

Sql Screening test followed by and Initial behavioral interview. Afterwards another SQL round in person. I was then moved on to the case study round before getting rejected. Was asked to orate an SQL query in the final round which was pretty odd, they could have provided a coderpad to make things more smooth. After spending the time to work on a case study and presentation I was rejected without any communication or any reasons as to why. This is highly unprofessional and I don’t know if I would even want to join them after seeing how they treated me in the final stage.