Backend Interview strategy

Here's a structured plan to help you prepare effectively:

1. Data Structures & Algorithms

• Focus on Arrays, Strings, Linked Lists, Stacks, Queues, HashMaps, Trees, Graphs.
• Solve problems on Leetcode (Medium-Hard) and CodeForces (Div 2).
• Practice Sliding Window, Two Pointers, Binary Search, DFS/BFS, DP.

2. System Design (LLD & HLD)

• Low-Level Design (LLD): OOP principles, SOLID, Design Patterns, Coding LLD questions.
• High-Level Design (HLD): Scalability, Caching, Load Balancing, DB Sharding, API Rate Limiting.

3. Backend Technologies

• Databases: SQL (Indexes, Joins, Transactions, Query Optimization), NoSQL (MongoDB, Redis).
• Caching: Redis, Memcached.
• Messaging Queues: Kafka, RabbitMQ.
• API Design: REST, GraphQL, WebSockets.
• Authentication & Security: JWT, OAuth, Encryption, HTTPS.

4. Frameworks & Languages

• Java, Python, or Go (Whichever you prefer).
• Spring Boot / Django / Express.js.
• Multithreading & Concurrency Concepts.

5. DevOps & Cloud

• Docker, Kubernetes, CI/CD Pipelines.
• AWS, GCP, or Azure Basics (EC2, S3, RDS, Lambda).

6. Mock Interviews

• Use Pramp, Interviewing.io, or take mock interviews with peers.