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Crack Your Backend Developer Interview

Prepare for backend developer interviews with practice questions on APIs, databases, microservices, and server architecture. AI-powered mock interviews included.

Interview Types
Technical, System Design, Coding, Behavioral
Average Salary
₹11,00,000 - ₹17,00,000
Key Skills
Node.js, Python, Databases

Key Skills to Master

Node.jsPythonDatabasesAPIsMicroservicesCloud

Sample Interview Questions

Q: Explain the differences between SQL and NoSQL databases.

SQL databases are relational, table-based with fixed schemas, and support ACID transactions. NoSQL databases are non-relational, flexible schema, and optimized for specific use cases like document storage, key-value pairs, or graph data.

Q: How do you design a rate limiter?

Common approaches include: token bucket algorithm, sliding window counter, fixed window counter. Consider distributed rate limiting with Redis, graceful degradation, and configurable limits per user/IP.

Q: What is the CAP theorem?

The CAP theorem states that in a distributed system, you can only guarantee two of three: Consistency (all nodes see same data), Availability (every request gets a response), and Partition tolerance (system works despite network failures).

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Frequently Asked Questions

What backend concepts should I know for interviews?

Core concepts include RESTful API design, database optimization, caching strategies, authentication/authorization, message queues, and microservices architecture.

Are system design questions common in backend interviews?

Yes, especially for mid-to-senior roles. Expect to design systems like URL shorteners, chat applications, news feeds, or notification systems.

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