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https://github.com/jagadeeshm007/cs-roadmap

Essential software engineering topics, including Data Structures & Algorithms, Database Management, Operating Systems, Networking, System Design, Linux, OOPS, Development, and Communication Skills.
https://github.com/jagadeeshm007/cs-roadmap

adsa beginner-friendly competitive-programming cpp data-structures-and-algorithms dsa hld java lld python roadmap

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Essential software engineering topics, including Data Structures & Algorithms, Database Management, Operating Systems, Networking, System Design, Linux, OOPS, Development, and Communication Skills.

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# Roadmap for Mastering Software Engineering Topics

Essential software engineering topics, including Data Structures & Algorithms, Database Management, Operating Systems, Networking, System Design, Linux, OOPS, Development, and Communication Skills.

---

## 1. Data Structures and Algorithms (DSA)

### **Basic Topics:**
- **Arrays, Strings**
- **Linked Lists** (Singly, Doubly, Circular)
- **Stacks and Queues**
- **Hashing** (HashMap, HashSet)
- **Binary Trees, Binary Search Trees (BSTs)**
- **Searching Algorithms:** Binary Search
- **Sorting Algorithms:** QuickSort, MergeSort, Bubble Sort, Selection Sort, Insertion Sort
- **Recursion and Backtracking Basics** (e.g., N-Queens, Rat in a Maze, Subset Sum)

**Example Problems:**
- Two Sum (LeetCode #1)
- Reverse a Linked List (LeetCode #206)
- Valid Parentheses (LeetCode #20)

### **Advanced Topics:**
- **Graph Algorithms:** BFS, DFS, Dijkstra, Floyd-Warshall
- **Dynamic Programming:** Knapsack, Longest Increasing Subsequence, Longest Common Subsequence, Matrix Chain Multiplication
- **Trie and Suffix Trees**
- **Segment Trees, Fenwick Trees**
- **Union-Find (Disjoint Set Union)**
- **Sliding Window & Two-pointer Techniques**
- **Advanced Sorting Algorithms:** Radix Sort, Counting Sort

**Example Problems:**
- Shortest Path in a Grid (Dijkstra's Algorithm)
- Edit Distance (Dynamic Programming)
- Implement Trie (LeetCode #208)

---

## 2. Database Management Systems (DBMS)

### **Basic Topics:**
- **Normalization and Denormalization**
- **ER Diagrams, Relational Models**
- **SQL Queries:** CRUD operations, Joins, Group By, Aggregate Functions
- **Indexing and Views**

### **Advanced Topics:**
- **ACID Properties, Transactions**
- **Concurrency Control:** Locks, Deadlocks
- **Database Sharding and Partitioning**
- **Query Optimization Techniques**
- **NoSQL Databases:** MongoDB, Cassandra
- **CAP Theorem**

**Example Queries:**
```sql
SELECT name FROM employees WHERE department='HR' ORDER BY salary DESC;
UPDATE customers SET email='newemail@example.com' WHERE id=10;
```

---

## 3. Operating Systems (OS)

### **Basic Topics:**
- **Process Management:** Scheduling Algorithms (FCFS, SJF, Round Robin)
- **Threads and Multithreading**
- **Deadlocks:** Detection, Avoidance, Prevention
- **Memory Management:** Paging, Segmentation

### **Advanced Topics:**
- **File Systems:** EXT, NTFS
- **Synchronization Mechanisms:** Semaphores, Mutexes, Monitors
- **Virtual Memory:** Page Replacement Algorithms (FIFO, LRU, Optimal)
- **Kernel Architecture and System Calls**
- **Distributed Systems Basics**

**Example Problems:**
- Implement a producer-consumer problem using semaphores.

---

## 4. Core Java

### **Basic Topics:**
- **Syntax and Basics:** Data Types, Loops, Operators
- **Exception Handling**
- **Collections Framework:** List, Set, Map
- **String Handling & Wrapper Classes**

### **Advanced Topics:**
- **Multithreading & Concurrency:** ExecutorService, Fork/Join Framework
- **Streams & Lambda Expressions**
- **JVM Architecture, Garbage Collection**
- **Design Patterns:** Singleton, Factory, Observer
- **Reflection & Annotations**

**Example Code:**
```java
List numbers = Arrays.asList(1, 2, 3, 4, 5);
numbers.stream().filter(n -> n % 2 == 0).forEach(System.out::println);
```

---

## 5. Networking

### **Basic Topics:**
- **OSI and TCP/IP Models**
- **IP Addressing:** IPv4, IPv6
- **DNS, DHCP, HTTP/HTTPS**
- **Socket Programming Basics**

### **Advanced Topics:**
- **Routing Protocols:** BGP, OSPF
- **Congestion Control Algorithms:** TCP/IP
- **Network Security:** SSL/TLS, Firewall, VPN
- **CDN (Content Delivery Network) Basics**
- **Proxy Servers, Load Balancers**

**Example:**
- Write a basic Python socket server and client.

---

## 6. System Design (LLD & HLD)

### **Basic Topics:**
- **UML Diagrams**
- **OOPS Concepts in Design**
- **Basic LLD for Real-world Problems:** Library Management System, Parking Lot

### **Advanced Topics:**
- **Scalable System Design:** Designing APIs, Rate Limiting
- **Microservices Architecture**
- **Database Design for Scalable Systems**
- **Caching Strategies:** Redis, Memcached
- **Event-Driven Systems:** Kafka, RabbitMQ
- **Case Studies:** URL Shortener, Social Media Feed, Ride-Sharing System

---

## 7. Linux

### **Basic Topics:**
- **Basic Commands:** ls, cp, mv, grep, awk
- **File Permissions and Ownership**
- **Shell Scripting Basics**

### **Advanced Topics:**
- **Process Management:** top, ps, kill
- **Networking Commands:** netstat, ifconfig, iptables
- **System Performance Monitoring:** vmstat, iostat
- **Log Analysis & Automation**
- **Docker & Containerization**

---

## 8. Object-Oriented Programming (OOPS)

### **Basic Topics:**
- **Principles:** Abstraction, Encapsulation, Inheritance, Polymorphism
- **Class and Object Basics**

### **Advanced Topics:**
- **SOLID Principles**
- **Dependency Injection**
- **Design Patterns:** Structural, Creational, Behavioral
- **Interface vs Abstract Classes**

---

## 9. Development

### **Basic Topics:**
- **Git Basics:** Commit, Push, Branching
- **Setting Up a Simple Web App:** HTML/CSS/JavaScript
- **Basic Framework Knowledge:** Spring Boot, Express.js

### **Advanced Topics:**
- **Full-Stack Development:** React, Node.js, Spring Boot
- **CI/CD Pipelines:** Jenkins, GitHub Actions
- **Cloud Platforms:** AWS, GCP, Azure
- **Testing Frameworks:** JUnit, Selenium, Postman

---

## 10. Communication Skills

### **Basic Topics:**
- **Clear and Concise Verbal Communication**
- **Structured Responses in Interviews**
- **Writing Concise and Impactful Emails**

### **Advanced Topics:**
- **Negotiation Skills During Discussions**
- **Leading Technical Discussions & Presentations**
- **Explaining Complex Technical Concepts to Non-Technical Stakeholders**

---