Eli Lilly and Company Interview Questions, Process, and Tips

Callback can lead to slower performance and increased complexity in code.

• Callback functions can create a lot of nested code, making it difficult to read and debug.

• Using callbacks can also lead to slower performance as each callback function adds to the call stack.

• Callback hell can occur when there are too many nested callbacks, making it difficult to manage and maintain code.

• Debugging callback functions can be challeng...read more

Authentication verifies user identity, authorization grants access to resources. React and Node use JWT for authentication and middleware for authorization.

• Authentication confirms user identity, authorization checks if user has access to requested resource

• React and Node use JSON Web Tokens (JWT) for authentication

• Middleware is used in Node for authorization

• JWT is sent in the header of HTTP requests

• Authorization middlew...read more