API Interview Questions

Last Updated: Nov 10, 2023

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API Interview Questions For Freshers

What is the difference between a GET request and a POST request?

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What is the HTTP status code 200 represent?

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What is an endpoint in an API?

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What is the difference between SOAP and REST?

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What are the advantages of using APIs in software development?

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What is REST?

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What is the purpose of an API key?

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What are the HTTP methods commonly used in APIs?

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What is JSON?

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What is an API?

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API Intermediate Interview Questions

What are the common security vulnerabilities in APIs and how can they be mitigated?

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What is an API gateway?

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What is the purpose of an API documentation?

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Explain the concept of rate limiting in APIs.

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What is versioning in APIs and why is it important?

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Explain the difference between synchronous and asynchronous API calls.

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

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What is an API proxy?

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What is an API request rate limit?

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Explain the term 'serialization' in the context of APIs.

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API Interview Questions For Experienced

How can you handle versioning of API endpoints?

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What is the role of API gateways in microservices architecture?

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What is the difference between GraphQL and REST APIs?

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What are the common authentication methods used in APIs?

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Explain the concept of caching in API responses.

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What is the role of an API architect?

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What is HATEOAS in RESTful APIs?

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What is the difference between a public and private API?

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Explain the concept of webhooks in APIs.

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What is OAuth and how does it work?

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What is the difference between encoding and encryption?

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