MCSD Web API and RESTful Services 2

Question 1

What is content negotiation in ASP.NET Web API?

Accepted Answer

The process of selecting the response format (JSON/XML) based on the client's Accept header

Answer

Content negotiation selects the best response format by matching the client's `Accept` header with the server's supported formatters.

Question 2

In REST API design, what is the purpose of HATEOAS?

Accepted Answer

Providing hypermedia links in responses so clients can discover available actions

Answer

HATEOAS (Hypermedia As The Engine Of Application State) includes links in responses to guide clients to related actions.

Question 3

What HTTP status code is returned when a requested resource does not exist in a REST API?

Accepted Answer

404 Not Found

Answer

HTTP 404 Not Found indicates the requested resource could not be located on the server.

Question 4

What does CORS stand for and why is it relevant to Web APIs?

Accepted Answer

Cross-Origin Resource Sharing — allows browsers to make API calls to a different domain

Answer

CORS (Cross-Origin Resource Sharing) is a browser security mechanism that Web APIs must configure to allow calls from different origins.

Question 5

Which approach to API versioning adds the version to the URL path?

Accepted Answer

URI versioning

Answer

URI versioning embeds the version in the URL path (e.g., `/api/v1/products`), making it explicit and easily cacheable.

MCSD Exam Practice Test