Header Versioning is more manageable for extensive API versioning, as it keeps version information separate from the URI, promoting cleaner and more flexible URLs.

Mocking third-party APIs allows the team to control the testing environment, ensuring effective and controlled integration testing.

UDDI serves as a Registry and Repository in scenarios where multiple web services need seamless integration. It acts as a central location where service providers publish service descriptions, and consumers can discover and integrate these services efficiently, promoting interoperability in a distributed environment.

GraphQL allows for reduced over-fetching, optimizing performance especially in mobile environments with limited bandwidth.

Input validation is a security principle that involves validating and sanitizing user inputs to prevent security vulnerabilities.

Adhering to RESTful architecture is a best practice for ensuring web services are scalable and maintainable, promoting loose coupling and scalability.

In RESTful services, a 'Resource' fundamentally represents an endpoint or a service that can be identified by a unique URI (Uniform Resource Identifier). Resources are entities that the API can act upon, and they can represent data objects, services, or entities that the API interacts with.

JUnit is a popular framework for unit testing in Java-based web services.

Microservices architecture is most effective for integrating with multiple third-party services, providing flexibility and modularity.

OAuth is commonly used for authorization in web service security. It allows secure and controlled access to resources by enabling a token-based authentication mechanism. OAuth is widely employed in scenarios where third-party applications require limited access to a user's resources without exposing sensitive credentials.