Technical Interview Preparation Guide

## Technical Interview Structure Most technical interviews for freshers include: 1. **DSA Round** — Solve 1-2 coding problems (45 mins) 2. **CS Fundamentals** — OS, DBMS, CN, OOP (30 mins) 3. **Project Discussion** — Deep dive into your projects (20 mins) ## DSA Preparation Strategy ### Must-Know Topics - Arrays & Strings - Linked Lists - Stacks & Queues - Trees & Graphs (BFS, DFS) - Dynamic Programming (basic) - Sorting & Searching - Hashing ### Practice Plan - Solve 150-200 problems on LeetCode/GeeksForGeeks - Focus on medium difficulty - Practice explaining your approach out loud ## CS Fundamentals ### Operating Systems - Process vs Thread - Deadlock conditions - Memory management (paging, segmentation) - CPU scheduling algorithms ### DBMS - Normalization (1NF, 2NF, 3NF) - ACID properties - Joins (inner, outer, cross) - Indexing ### Computer Networks - OSI model layers - TCP vs UDP - HTTP/HTTPS - DNS resolution ### OOP - Four pillars (Encapsulation, Inheritance, Polymorphism, Abstraction) - SOLID principles - Design patterns (Singleton, Factory, Observer)