OA at cisco for summer internship , 42 questions were asked. 40 MCQs and 2 coding questions. These typically test a range of topics, including: Computer Science Fundamentals: Data structures (arrays, linked lists, stacks, queues, trees, graphs) Algorithms (sorting, searching, dynamic programming) Time complexity and space complexity analysis Networking and Operating Systems: Basic networking concepts (TCP/IP, OSI model, routing protocols, IP addressing) OS concepts like processes, threads, memory management, and deadlocks Database and SQL: Questions about database management systems (DBMS), SQL queries, normalization, and relationships (e.g., primary/foreign keys) Object-Oriented Programming (OOP): OOP concepts (inheritance, polymorphism, encapsulation, and abstraction) Practical scenarios to apply OOP principles General Aptitude: Logical reasoning, quantitative aptitude, and pattern recognition