Interview Questions and Answers

JWT is a compact, URL-safe means of representing claims to be transferred between two parties. In Web APIs, it is often used for authentication and information exchange.

Example:

Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

OAuth is an open standard for access delegation commonly used in the context of user authentication and authorization. It allows third-party applications to access resources on behalf of a user without exposing their credentials.

HATEOAS (Hypermedia As The Engine Of Application State) is a constraint in the REST architectural style where the response from a server provides links to related resources. It allows clients to navigate a web application dynamically.

Hypermedia refers to the inclusion of hyperlinks in a response, allowing clients to discover and navigate related resources. It is a key aspect of HATEOAS and enhances the flexibility and discoverability of RESTful APIs.

Advantages include statelessness, compactness, and ease of implementation. Disadvantages may include potential security risks if not properly implemented, and the inability to revoke tokens before expiration.