5 subjects with 30 Q&As each: ☕ Java — OOP, threads, collections, exceptions & more 🗄️ DBMS — SQL, normalization, ACID, joins & more ⚙️ OS — processes, scheduling, memory, deadlock & more 🌐 CN — OSI model, TCP/UDP, DNS, routing & more 🛠️ Software Engineering — SDLC, Agile, UML, testing & more