The ability of a person booking a flight on Southwest.com's website to reserve a car from Dollar Rent-A-Car without having to leave the airline's website is an example of the usage by Dollar Rent-A-Car and Southwest Airlines of which of the following?

Question

BlackTom AI · Accepted Answer

Embedding Dollar Rent-A-Car reservation functionality directly into Southwest.com is an example of Web services.

1) Relevant knowledge points and concepts
- Web services are interoperable, machine-to-machine services exposed over a network (usually the internet) via standard protocols such as REST/HTTP or SOAP/XML. They enable different systems to communicate and exchange data regardless of platform or language.
- Service-oriented architecture (SOA) and APIs allow one company’s application to invoke functionality from another company without requiring the end user to leave the invoking site.
- SaaS (Software as a Service), PaaS (Platform as a Service), cloud computing, and nanotechnology are distinct concepts: SaaS is delivered software over the internet to end users; PaaS provides a development platform; cloud computing refers to on-demand computing resources; nanotechnology is unrelated to software integration.

2) Step-by-step reasoning
- The user remains on Southwest.com while booking and is able to reserve a Dollar car; this implies Southwest’s site is calling into Dollar’s system behind the scenes.
- That behind-the-scenes call is a programmatic, networked request/response (machine-to-machine), not simply a link or full redirect.
- Such programmatic integration is implemented by exposing functionality via a web service API (e.g., REST endpoints returning JSON or SOAP messages), which the airline consumes to display availability and complete reservations.

3) Intermediate details (no numeric calculation required)
- Southwest’s front end sends an HTTP request to Dollar’s web service endpoint with search parameters.
- Dollar’s service responds with available cars and rates in a structured format (JSON/XML).
- Southwest processes the response and displays it inline; the reservation call similarly posts booking data to Dollar’s API to create the rental.

4) Why the correct answer is correct
- The core behavior—cross-company, real-time, programmatic integration enabling a seamless booking experience—is the defining characteristic of web services.

5) Why other options are incorrect
- SaaS: refers to hosted software delivered to end users, not to the API-based cross-site integration shown.
- Cloud computing: a broad infrastructure model, not the specific interoperable API use.
- PaaS: a developer platform for building apps, not the consumer-facing integration mechanism.
- Nanotechnology: unrelated to web or software services.

6) Conclusion
The correct answer is Web services, which matches the provided answer.

The ability of a person booking a flight on Southwest.com's website to reserve a car from Dollar Rent-A-Car without having to leave the airline's website is an example of the usage by Dollar Rent-A-Car and Southwest Airlines of which of the following? Single choice

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