Interviewers commonly ask medium-level questions across CS fundamentals. In OOPs, expect concepts like inheritance, polymorphism, and method overriding. DBMS questions often involve normalization, SQL joins, and ACID properties. In OS, focus areas include process scheduling, memory management, and deadlocks. DSA typically includes problems on arrays, trees, and hashmaps. From projects, be ready to explain architecture, your contributions, tech stack, and key challenges faced.