How to Learn Backend Development #BackendDevelopment

📌 What are the key areas in backend development?
Backend developers need to understand client-server architecture, databases (SQL/NoSQL), backend languages (like Python or Java), APIs (REST, GraphQL), authentication (JWT, OAuth), hosting/cloud platforms (AWS, GCP), and DevOps tools (Docker, CI/CD, monitoring).

📌 What is a simplified Git workflow?
A basic Git workflow involves adding changes (git add), committing (git commit), pushing to remote (git push), pulling updates (git pull), and merging branches (git merge). git diff helps track changes.

📌 How do virtualization and containerization differ?
Virtualization runs multiple OS instances via hypervisors, offering strong isolation but using more resources. Containerization runs lightweight, isolated apps sharing the host OS, making it faster and more efficient.

📌 Common deployment models:
Bare Metal: No virtualization; high performance.

Virtualized: VMs with guest OS.

Containerized: Efficient, scalable containers.

Containerized on Virtualized: Used in hybrid cloud for flexibility and security.

📌 How does Netflix’s Distributed Counter ensure performance?
Netflix uses a multi-layered system—API, event logging, rollup aggregation, and caching (EVCache)—to process millions of user interactions quickly with eventual consistency and high scalability.

📌 Why use Distributed Counters?
They help platforms like Netflix count user actions across servers in real-time, enabling scalable analytics and system optimization without bottlenecks.

📌 What types of APIs should backend developers know?
Key APIs include REST, GraphQL, gRPC, and SOAP. Developers should also understand security protocols like JWT, OAuth 2, and API keys for safe data exchange.
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