30 Backend API Testing With Python Interview Question and Answers

30 Python Backend API Testing Interview Questions
Core Concepts and Tools
What is the difference between API testing and unit testing?
How do you handle API versioning in your testing strategy?
What is the role of a test framework like pytest or unittest in API testing?
Explain the concept of API contract testing and its benefits.
What are some common HTTP status codes you encounter in API testing?
How do you handle authentication and authorization in your API tests?
What are some best practices for writing maintainable and reusable API tests?
How do you test RESTful APIs?
What is the importance of API documentation in testing?
Testing Techniques
Describe the process of writing a basic API test using Python and a testing framework.
How do you test API performance?
What is load testing, and how do you perform it for APIs?
Explain the concept of API security testing. What are some common vulnerabilities to look for?
How do you test for API rate limiting?
What is negative testing, and why is it important for APIs?
How do you handle API errors and exceptions in your tests?
How do you test API endpoints that return different data formats (e.g., JSON, XML)?
What is the role of a mock server in API testing?
Python-Specific Topics
How do you use Python libraries like requests or httplib2 for making HTTP requests in API tests?
What are some common Python libraries or frameworks for API testing automation?
How do you handle asynchronous requests in API testing with Python?
What are some best practices for using Python's built-in JSON library for parsing API responses?
How do you test APIs that require specific headers or query parameters?
How do you handle API endpoints that require authentication using OAuth or JWT?
What is the role of a testing environment in API testing? How do you set up a testing environment for Python-based APIs?
Advanced Topics
How do you test APIs that interact with external services (e.g., databases, third-party APIs)?
How do you test APIs that use WebSocket protocols?
What is API versioning, and how do you handle it in your testing strategy?
How do you test APIs that use GraphQL?
What are some challenges and best practices for testing microservices-based APIs?