DBMS: Basics of tables, queries, and indexing. Shared how I use efficient queries in real projects. OOPS: Explained core concepts and how I apply them in structuring code. Gave simple real-world examples. Node.js: Talked about building APIs with Express/Fastify and using JWT auth. Mentioned async handling and performance work. JavaScript: Covered closures, async-await, and event loop. Gave quick examples of practical usage. HTML/CSS: Spoke about semantic HTML and responsive layouts. Mentioned using Flexbox/Grid for clean UI.