NodeJS: NestJS

NodeJS framework NestJS

"What are the benefits of using the @Controller() decorator in NestJS?"

"It defines a controller and associates it with a route prefix

"How do HTTP method decorators like @Get() and @Post() function within a controller?"

"They define endpoints for specific HTTP methods

"How can dynamic route parameters be accessed in a NestJS application?"

"Using the @Param() decorator to access route parameters in handler functions."

"What are some use cases for using route parameters in an API?"

"Fetching resources by ID

"What is the difference between using @Req() and @Res() in a NestJS controller?"

"@Req() accesses the request object

"When should you opt for library-specific response handling over the standard approach?"

"When you need full control over the response object

"Why are classes preferred over interfaces for defining DTOs in NestJS?"

"Classes are preserved in compiled JavaScript

"How do DTOs contribute to the validation and structure of incoming data?"

"They define the expected data shape and can be used with validation pipes to enforce data integrity."

"What are the advantages of using async functions in NestJS controllers?"

"They handle asynchronous operations efficiently

"How does NestJS handle asynchronous operations in route handlers?"

"By supporting async functions and automatically resolving returned Promises."

"Why is it important to include controllers in a module using the @Module() decorator?"

"It registers controllers with the application

"How does module integration affect the scalability of a NestJS application?"

"It organizes code into reusable modules

"How can you set custom response headers in a NestJS application?"

"Using the @Header() decorator or manipulating the response object directly."

"What scenarios might require changing the default status codes in a response?"

"When specific HTTP status codes are needed to indicate different outcomes

"How does the @Redirect() decorator work in NestJS?"

"It redirects responses to a specified URL

"What are some practical applications of redirecting responses in an API?"

"Redirecting to updated resource locations or external authentication services."