Pergunta de entrevista da empresa AQR Capital Management

I had 2 interviews . The first Interview I had questions on OOPS concepts and SQL Databases and 1 coding question (Buy and sell stock IV). The second Interview my projects were reviewed and there were questions based on system design and implementation of LRU cache. The third round was HR round and questions were related to company and aptitude type. All those had a duration nearly 45 minutes.