What They Ask:
Core concepts:
Data Structures: arrays, stacks, linked lists
Algorithms: sorting, searching, recursion
OOP: classes, inheritance, polymorphism
DBMS: joins, normalization, SQL queries
OS: processes, memory management
CN: TCP/IP, OSI layers, protocols
Hands-on Coding:
Write code live (usually simple but correct)
Debug or explain existing code
Project Questions:
What did you build? Tools used?
Explain architecture, logic, challenges
