What is the most common HTTP status code for indicating a client-side error in a web service?
- 200 - OK
- 400 - Bad Request
- 404 - Not Found
- 500 - Internal Server Error
The HTTP status code 400 (Bad Request) is commonly used to indicate a client-side error in a web service.
In a scenario where API endpoints change frequently, how can Postman assist in maintaining test accuracy?
- Change the test scripts each time
- Rely on manual testing
- Update the documentation only
- Use variables and environments
Postman allows the use of variables and environments, helping maintain test accuracy even when API endpoints change frequently.
What is the primary objective of performance testing in web services?
- Analyzing database structure
- Assessing system responsiveness and stability under varying loads
- Checking code syntax errors
- Designing user interfaces
Performance testing in web services aims to evaluate system responsiveness and stability under different loads, ensuring optimal performance.
What role does contract testing play in integration testing of web services?
- Only applicable in monolithic architectures
- Testing individual services in isolation
- Validating user interfaces
- Verifying agreements between services
Contract testing involves verifying the contracts or agreements between services, ensuring they interact as expected.
What is the primary purpose of UDDI in web services?
- Creating user interfaces
- Discovering and publishing web services
- Managing databases
- Running server-side scripts
UDDI (Universal Description, Discovery, and Integration) is primarily used for discovering and publishing web services, allowing businesses to find and interact with each other's services.
What is the primary difference in the way data is retrieved between GraphQL and REST?
- Both retrieve data in the same way
- GraphQL retrieves fixed data structures, while REST allows clients to request only the data they need
- None of the above
- REST retrieves fixed data structures, while GraphQL allows clients to request only the data they need
GraphQL allows clients to specify the exact data they need, minimizing over-fetching or under-fetching, while REST returns fixed data structures.
WS-Security is a standard that applies security at the _______ level.
- Application
- Message
- Network
- Transport
WS-Security is a standard that applies security at the message level. It ensures the confidentiality, integrity, and authentication of messages exchanged between web services by embedding security information directly within the SOAP message.
How does HTTP/2 improve performance compared to HTTP/1.1 in web services?
- All of the above
- Compression
- Multiplexing
- Prioritization
HTTP/2 improves performance through features like multiplexing, compression, and prioritization. These enhancements lead to more efficient data transfer, reduced latency, and optimized resource utilization, providing a significant boost in web services performance compared to the older HTTP/1.1 protocol.
In the context of web services, what does UDDI provide?
- Communication protocol for web services
- Data serialization for web services
- Directory services for discovering web services
- Security for web services
UDDI (Universal Description, Discovery, and Integration) provides directory services for discovering web services, allowing applications to find and invoke web services dynamically.
A web service has to be updated without disrupting existing clients. What versioning strategy should be used?
- Header Versioning
- Media Type Versioning
- Query Parameter Versioning
- URI Versioning
Header Versioning involves specifying the version information in the HTTP headers, allowing seamless updates without disrupting existing clients.