API Security and Testing Questions

Comprehensive coverage of testing and securing application programming interfaces. Includes designing, implementing, and automating tests across functional, integration, regression, and security areas. Core topics include authentication and authorization models and how to validate them in tests; request and response validation and schema enforcement; data format testing for JavaScript Object Notation and Extensible Markup Language; contract testing and integration validation; rate limiting and denial of service protections; input validation and injection attack detection; sensitive data exposure detection and prevention; business logic flaw analysis; fuzz testing; and penetration testing integration. Also covers test automation strategies and tooling such as Postman, Newman, and REST-assured; mocking and stubbing downstream services; testing complex behaviors across microservice architectures; test environment and test data management; and integrating automated API tests into continuous integration and continuous delivery pipelines. Emphasizes automated security testing workflows including reconnaissance, authentication and authorization checks, injection attack simulation, data exfiltration checks, and incorporation of API security into penetration testing and remediation processes. Finally, addresses monitoring, observability, runtime protections such as API gateways and web application firewalls, and best practices for secure API design, testing, and ongoing validation.