In this video, I will solve 30 Backend Interview Questions, after this video, you will feel yourself equipped with Backend Concepts, ready for Placements and Tech Interviews.
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Role of backend in web applications
HTTP requests and methods (GET, POST, PUT, DELETE)
How servers handle client requests
Difference between relational (SQL) and non-relational (NoSQL) databases
Environment variables and their importance
API concepts and usage in backend development
Primary keys and indexing
Database schema design (e.g., blogs, e-commerce)
SQL vs NoSQL trade-offs
Database normalization and denormalization
Caching strategies (Redis, Memcached)
Database replication, sharding, and scaling
Eventual consistency vs strong consistency
Multi-tenant database schema design
Database recovery and disaster management
RESTful API design principles
API authentication (JWT, OAuth) vs authorization
API versioning strategies
Securing APIs against SQL Injection, CSRF, XSS
Handling long-running tasks in APIs
Pagination techniques for large datasets
Idempotency in API requests (e.g., Payment APIs)
Rate limiting using Token Bucket Algorithm
Monolithic vs microservices architecture
Horizontal vs vertical scaling strategies
High-availability systems (HA architecture)
Load balancing (round-robin, least connections)
Circuit breaker patterns for fault tolerance
Handling high-traffic spikes in backend services
Optimizing slow SQL queries
Connection pooling in high-traffic applications
WebSockets and real-time messaging (e.g., chat apps, stock updates)
Designing a content delivery system (CDN, edge computing)
Push notifications (SMS, email, Firebase Cloud Messaging)
Asynchronous job processing (RabbitMQ, Kafka, Celery)
Distributed transactions and their challenges