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1.
What is an API and what are its main purposes?
Answer:
API Design Fundamentals
- 2.
Can you explain the difference between an API and a Web service?
Answer: - 3.
What are the principles of a RESTful API?
Answer: - 4.
How does a SOAP API differ from a REST API?
Answer: - 5.
What is an API endpoint?
Answer: - 6.
What are the common methods (HTTP verbs) used in a REST API, and what does each method do?
Answer: - 7.
How do you version an API?
Answer: - 8.
What is idempotence in the context of API design, and why is it important?
Answer: - 9.
Can you explain what API rate limiting is and give an example of why it might be used?
Answer: - 10.
Describe the concept of OAuth in relation to API security.
Answer:
API Design Best Practices
- 11.
What strategies would you use to ensure the backward compatibility of an API?
Answer: - 12.
What are some common response codes that an API might return, and what do they signify?
Answer: - 13.
How can you design an API to be easily consumable by clients?
Answer: - 14.
When designing an API, how would you document it for end-users?
Answer: - 15.
What considerations might influence how you paginate API responses?
Answer: - 16.
What is HATEOAS, and how does it relate to API design?
Answer: - 17.
How would you handle localization and internationalization in APIs?
Answer: - 18.
What are some best practices for designing error responses in an API?
Answer: - 19.
What are the benefits of using API Gateways?
Answer: - 20.
How would you approach handling file uploads in an API design?
Answer:
API Performance and Scalability
- 21.
How can caching be incorporated into API design to improve performance?
Answer: - 22.
What are some strategies for dealing with high traffic volumes in a scalable API?
Answer: - 23.
How does connection pooling work and how can it benefit API performance?
Answer: - 24.
When is it appropriate to use synchronous vs asynchronous processing in an API?
Answer: - 25.
What are some challenges of maintaining an API at scale?
Answer:
API Security Considerations
- 26.
What are common security concerns when designing an API?
Answer: - 27.
How do you prevent injection attacks in API design?
Answer: - 28.
Can you explain what CORS is and why it’s important in API design?
Answer: - 29.
What is the purpose of an API key?
Answer: - 30.
How would you implement authentication and authorization in APIs?
Answer:
Advanced API Design Concepts
- 31.
What is the role of an API Gateway in microservices architecture?
Answer: - 32.
Can you explain the concept of a headless API?
Answer: - 33.
How do GraphQL APIs differ from traditional RESTful APIs?
Answer: - 34.
What is gRPC and how might it be used in API design?
Answer: - 35.
How can WebSockets enhance API functionalities?
Answer:
API Development and Testing
- 36.
What tools or frameworks do you use to develop and test APIs?
Answer: - 37.
How would you test for API performance and what metrics would you track?
Answer: - 38.
What is contract testing in the context of API development?
Answer: - 39.
Describe the mocking of APIs for development and testing purposes.
Answer: - 40.
How can automated API testing improve the software development lifecycle?
Answer:
API Data Management
- 41.
How do you handle large volumes of data in API responses?
Answer: - 42.
How can an API be designed to support multiple data formats?
Answer: - 43.
What are best practices for managing sensitive data through an API?
Answer: - 44.
In an API, how do you approach filtering and sorting of data?
Answer: - 45.
Can you discuss strategies for transaction management within API endpoints?
Answer:
API Specification and Standards
- 46.
Are you familiar with any API specification formats and what benefits do they provide?
Answer: - 47.
How do you approach the design of an API to comply with industry standards?
Answer: - 48.
How do you foresee OpenAPI/Swagger specifications evolving, and how do they impact API design?
Answer: - 49.
How can APIs be designed with interoperability in mind?
Answer: - 50.
How does a standard like JSON:API influence the way you structure response payloads?
Answer:
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