[&] What is the primary purpose of a web service?
- To facilitate machine-to-machine communication
- To offer a user interface for data interaction
- To provide access to application functionality for developers
- To replace traditional database queries

[&] How do web services typically handle security and communication standards?
- Using OpenAPI exclusively for API documentation
- Through direct hardware firewalls only
- Via WS Security and WS Policy for SOAP-based services
- Through proprietary encryption protocols

[&] In terms of data formats, what is a key difference between web services and APIs?
- Web services use only XML, while APIs use only JSON
- Web services support multiple formats like XML and JSON
- APIs are restricted to JSON and HTML formats
- Both web services and APIs exclusively use binary formats

[&] What distinguishes web services from APIs in terms of their interaction model?
- APIs are confined to desktop applications
- Web services always include human interfaces
- Web services focus on machine-only communication
- APIs require direct system integration

[&] Which of the following best describes an API?
- A language for defining web service standards
- A user interface for monitoring web server activity
- A set of rules allowing access to application functionality
- A protocol for exchanging files between servers

[&] Why might a developer choose to use an API over a web service?
- To reduce the complexity of SOAP protocol messages
- To expose application functionality for integration into other applications
- To standardize XML data formats for communication
- To enable machine-to-machine communication without human interaction