To prepare for interviews, focus on: Data Structures and Algorithms (DSA): Practice problems involving arrays, linked lists, trees, graphs, sorting, searching, and dynamic programming. Coding: Improve problem-solving skills in C/C++, Python, or Java by solving competitive programming challenges. Operating Systems (OS): Understand process management, threading, synchronization, memory management, and file systems. Networking: Study the OSI model, TCP/IP protocols, routing, switching, and network security fundamentals.