APIs Interview Questions For Freshers

What is the difference between PUT and POST methods in REST?

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What is Swagger? How is it useful for API development?

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How do you handle errors and exceptions in API responses?

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What is an API client?

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What is the difference between synchronous and asynchronous API calls?

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What is an API gateway?

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What are the potential security risks associated with APIs?

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What is versioning in APIs and why is it important?

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What is the role of API documentation?

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Explain the concept of webhooks.

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How can APIs be used for data integration between different systems?

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What is pagination in APIs?

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What are the best practices for designing and developing APIs?

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What is the purpose of HTTP status codes in API responses?

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What are the HTTP methods commonly used in RESTful APIs?

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How does an API handle authentication and authorization?

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What are the benefits of using APIs in your applications?

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What is rate limiting in APIs?

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What is an API key and why is it used?

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Explain the concept of endpoints in APIs.

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What is JSON?

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What is the difference between SOAP and REST?

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Name some popular APIs used in web development.

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What is an API?

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What is the role of cross-origin resource sharing (CORS) in APIs?

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Explain the concept of rate limiting in APIs.

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What is an API marketplace?

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How do you handle versioning conflicts in API development?

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What is the role of headers in API requests and responses?

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What is the purpose of a callback function in API integration?

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What are the common data formats used in API responses?

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What is caching in APIs and why is it used?

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APIs Intermediate Interview Questions

What is the purpose of content types in API requests and responses?

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What is the role of error codes in API responses?

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How can you handle long-running API operations?

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What is the role of API governance in organizations?

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What is the difference between two-legged and three-legged OAuth?

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Explain the concept of event-driven APIs.

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What is the purpose of schema validation in API requests?

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How can you handle API versioning with vendor-specific media types?

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What are the common authentication mechanisms used in APIs?

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What is the role of API marketing in driving adoption?

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What are the advantages of using RESTful APIs over SOAP?

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Explain the concept of hypermedia in APIs.

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What are the best practices for handling API versioning?

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How can you monitor API performance and usage?

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What is the purpose of bearer tokens in API authentication?

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What are the principles of API first design?

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How do you implement pagination in API responses?

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What is the difference between API and web services?

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How can you handle data validation in API requests?

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How can you design APIs to be more resilient?

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How can you handle versioning in API URLs?

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What is the purpose of content negotiation in API responses?

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What is HATEOAS in the context of RESTful APIs?

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What are the advantages of using API gateways in microservices architecture?

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What are the best practices for documenting APIs?

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Explain the concept of API versioning using request headers.

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What are the steps involved in consuming an API in your application?

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How can you secure an API using OAuth?

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What is the role of ETags in API caching?

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What is the difference between GraphQL and traditional REST APIs?

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Explain the concept of throttling in APIs.

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What is the purpose of query parameters in API requests?

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Can you explain the concept of RESTful API design principles?

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What is the difference between SDK and API?

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APIs Interview Questions For Experienced

How can you implement data streaming APIs?

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What are the best practices for handling API security threats?

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Explain the concept of semantic versioning in API development.

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What is the role of API marketplaces in ecosystem development?

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How can you handle backward compatibility in API evolution?

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What are the considerations for building scalable and performant APIs?

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Explain the concept of federated APIs.

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What is the purpose of API virtualization in testing and development?

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Explain the concept of continuous API testing.

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How can you implement API composition and aggregation?

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What are the best practices for managing API lifecycle?

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Explain the concept of event sourcing in API design.

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What is the role of message transformation in API integration?

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How can you handle API versioning with custom media types?

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What are the challenges of scaling APIs in distributed systems?

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Explain the concept of contract-first API design.

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What is the purpose of API analytics in monitoring and improving performance?

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How can you implement real-time API communication using WebSockets?

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What is the role of API governance in large-scale organizations?

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What are the best practices for securing APIs against attacks?

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How can you implement event-driven architecture using APIs?

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What is the purpose of fault tolerance in API architecture?

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What is the role of message queues in asynchronous API communication?

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Explain the concept of API monetization models.

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How can you handle data validation in API responses?

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What is the purpose of content negotiation in API requests?

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