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Introduction to Computer Networking
Module 2: IP Addressing, Subnetting & Routing
Module 1: Basics & the Layered Models
Module 4: DNS, HTTP & TLS - the Application Layer
Module 5: Firewalls, NAT, VPNs & Load Balancing
Module 6: Networking for System Design Interviews
Module 3: TCP & UDP - the Transport Layer
config
How to Manage Multiple GitHub Accounts on One Computer using SSH
database
Database Management Systems Interview Handbook
SQL Interview Handbook: From MariaDB Setup to Advanced Query Patterns
DevOps
docker
k8s
AWS Hands-On for DevOps — VPC, IAM, EC2, Load Balancers, S3, RDS, EKS, and Troubleshooting
CI/CD Pipelines — GitHub Actions, Jenkins, Deployment Strategies, GitOps, and DORA Metrics
Cloud Computing: From First Principles to Interview Confidence
DevOps Scenarios, Interview Question Bank, and Capstone Project
Git and Version Control for DevOps — Branching, Merge vs Rebase, Undoing Mistakes, and Team Workflows
Introduction to DevOps
Kubernetes Production Guide — Probes, Resources, Rollouts, Security, Gateway API, GitOps, and Troubleshooting
Linux for DevOps — Permissions, Processes, systemd, Networking, Performance Troubleshooting, and Playbooks
Monitoring and Logging — Prometheus, Grafana, Alertmanager, Loki, ELK, and OpenTelemetry in Practice
Shell Scripting for DevOps
Shell Scripting for DevOps
Terraform and Infrastructure as Code — State, Modules, Environments, CI Workflows, and Ansible
OOP Mastery for MAANG Interviews
Module 1: Classes, Objects & Memory
Module 2: Encapsulation & Data Hiding
Module 3: Inheritance & Composition
Module 4: Polymorphism & Abstraction
Module 5 (Part 1): SOLID Principles & Design Patterns
Module 5 (Part 2): Design Patterns, Principles & the LLD Interview Playbook
operating systems
Operating Systems Interview Handbook: From Fundamentals to Whiteboard-Ready Answers
socketio
Introduction to Socket-io
System Design Overview
API Gateway
Authentication and Security in System Design — Sessions, JWT, OAuth, Authorization, and Common Attacks
Caching and CDN — Speeding Up Systems at Every Layer
System Design Cheat Sheet — Numbers, Formulas, Trade-offs, and Practice Questions
Circuit Breaker Pattern
CQRS and Event Sourcing
Databases in System Design — SQL, NoSQL, Indexing, Transactions, Replication, Sharding, and CAP
Distributed Systems Essentials — Transactions, Consensus, Leader Election, Locks, Clocks, and IDs
Domain Name System (DNS) — How the Internet's Phone Book Works
Event-Driven Architecture
System Design Case Study — File Storage and Sync (Dropbox / Google Drive)
High Availability
Load Balancing — Distributing Traffic for High Availability and Scale
Message Queues, Kafka, Pub/Sub, Real-Time Communication, and REST vs gRPC — Communication Patterns in System Design
Microservices Architecture
Monolithic Architecture
System Design Case Study — Netflix (Video Streaming at Global Scale)
IP Addresses, OSI Model, TCP and UDP — Networking Fundamentals for System Design
System Design Case Study — Notification System (Push, SMS, Email at Scale)
Observability and Deployment — Metrics, Logs, Traces, SLOs, Safe Releases, and Disaster Recovery
System Design Case Study — Distributed Rate Limiter
Rate Limiting
Vertical vs Horizontal Scaling
How to Ace System Design Interviews — A Complete Framework and Checklist
System Design Case Study — Ticket Booking System (BookMyShow / Ticketmaster)
System Design Case Study — Twitter (Social Media at Scale)
System Design Case Study — Search Autocomplete (Typeahead Suggestions)
System Design Case Study — Uber (Ride-Hailing at Global Scale)
System Design Case Study — URL Shortener (like Bitly or TinyURL)
System Design Case Study — Web Crawler (Search Engine Crawling at Scale)
What is System Design?
System Design Case Study — WhatsApp (Instant Messaging at Scale)
Web Vulnerabilities Overview
Clickjacking Vulnerability
Cross-Site Request Forgery (CSRF)
Host Header Injection
HTTP Request Smuggling
JWT Vulnerabilities
LLM Security Vulnerabilities
Mastering Web Security: Complete PortSwigger Academy Lab Solutions
Prototype Pollution
Web Cache Deception
Web Cache Poisoning
C++ STL for Competitive Programming: From Basics to Contest-Ready Speed
C++ to Java and JavaScript: Competitive Programming Tutorial
DSA Pattern Index: Complete Field Manual
Advanced Bug Bounty Hunting Methodology
Custom Nuclei Templates in Bug Bounty Hunting
Mastering Google Dorks for Passive Reconnaissance
Identifying Tech Stacks via Session Tokens
BLOGS
methodology
Rajendra Pancholi
Updated :
Apr 18, 2026