In contract testing, which tool is commonly used for validating API contracts?
- JUnit
- Pact
- Postman
- Swagger
Contract testing commonly uses Pact as a tool for validating API contracts. Pact is designed to ensure that the contracts between services are honored, enabling better communication and collaboration.
What is the importance of contract testing in a microservices architecture?
- Ensures compatibility between services
- Monitors server uptime
- Validates user interface design
- Verifies database performance
Contract testing in a microservices architecture is crucial for ensuring compatibility between services. It involves validating the agreements (contracts) between different services to ensure that they can communicate effectively without breaking each other's functionality. This helps maintain a reliable and stable system.
To handle peak traffic times, APIs may implement dynamic rate limiting which adjusts limits based on _________.
- Historical Data
- Real-time Metrics
- Server Load
- User Preferences
Dynamic rate limiting adjusts limits based on real-time metrics such as server load or other factors. By dynamically adjusting limits, APIs can handle varying levels of traffic and ensure optimal performance during peak times.
_________ is an important aspect of error handling that prevents exposing sensitive data through error messages.
- Error Masking
- Exception Handling
- Stack Tracing
- Status Code
Error masking is an essential aspect of error handling that prevents exposing sensitive data through error messages. Instead of revealing detailed information about the internal system, error masking provides a generalized and user-friendly message while logging the detailed error information securely for system administrators. This practice helps in maintaining the security of the system by not divulging critical information to potential attackers or unauthorized users.
In RESTful APIs, which HTTP method is idempotent and used for updating resources?
- DELETE
- PATCH
- POST
- PUT
The HTTP method PUT is idempotent and used for updating resources in RESTful APIs. Idempotent means that making the same request multiple times will have the same effect as a single request.
In Postman, _________ are used to automate test runs...
- Collections
- Environments
- Monitors
- Test Suites
In Postman, "Environments" are used to automate test runs across multiple environments. Environments allow you to set up different configurations and variables for your API tests, facilitating testing in various scenarios.
In the context of API testing, how does mocking differ from stubbing?
- Both mocking and stubbing are identical in API testing.
- Mocking is only applicable to frontend testing, whereas stubbing is for backend testing.
- Mocking is used to simulate the entire behavior of a component, while stubbing replaces specific behavior with predetermined values.
- Mocking replaces specific behavior with predetermined values, while stubbing is used to simulate the entire behavior of a component.
Mocking vs Stubbing in API Testing
What is the main advantage of using virtualized services in API test environments?
- Efficient resource utilization
- Enhanced test parallelization
- Improved test repeatability
- Simplified test data management
Virtualized services in API testing offer efficient resource utilization, allowing multiple tests to run concurrently on the same infrastructure, reducing resource costs and time.
In a scenario where an API Gateway is the entry point for multiple backend services, what is a key area to test for ensuring service availability?
- Database optimization
- Fault tolerance
- Load balancing
- Security protocols
In this scenario, testing for fault tolerance becomes crucial. An API Gateway should gracefully handle failures in backend services to ensure continuous service availability. Fault tolerance testing assesses the system's resilience against potential failures and ensures uninterrupted service.
In API testing tools, what role does the 'Mock Server' feature play?
- It is used for capturing API requests but not for generating responses.
- It simulates the behavior of a real server, allowing testing without actual endpoints.
- Mock Server is primarily for monitoring API performance in production.
- Mock Server is used for load testing and does not affect the API responses.
The 'Mock Server' feature in API testing tools, such as SoapUI or Postman, serves the purpose of simulating the behavior of a real server. It allows testers to conduct testing without relying on actual endpoints, facilitating early testing stages. This simulation helps uncover potential issues and ensures that the API functions as expected. It is particularly useful for testing scenarios where actual endpoints may not be readily available or stable.