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What does Dependency Injection (DI) enable in NestJS?

Better performance
Code reuse
Tight coupling
Simpler debugging

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How can you handle file uploads in NestJS?

By using the @FileUpload() decorator
By configuring middleware to parse multipart/form-data
By using the fs module from Node.js
By defining a custom interceptor

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What is NestJS?

A database management system
A TypeScript-based Node.js framework
A front-end JavaScript library
An operating system kernel

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What is the primary purpose of a service in NestJS?

To define application routes
To encapsulate business logic and share data between components
To handle HTTP requests
To manage database connections

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How can you handle database operations in NestJS?

By using the @Database() decorator
By defining a custom middleware
By using third-party libraries like TypeORM or Sequelize
By directly interacting with the database in controllers

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Which of the following is NOT a core concept in NestJS?

Middleware
Components
Modules
Schemas

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What is the purpose of middleware in NestJS?

To handle HTTP requests and responses
To manage database operations
To define application routes
To encapsulate business logic

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How can you handle Cross-Origin Resource Sharing (CORS) in NestJS?

By using the @CrossOrigin() decorator
By using the @CrossOrigin() decorator
By setting CORS headers in middleware
By using the @EnableCors() decorator

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Which of the following is true about modules in NestJS?

Modules are optional in NestJS applications
Modules are a collection of components, controllers, services, and more
NestJS doesn't support modules
Modules can only contain controllers

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How can you handle CORS (Cross-Origin Resource Sharing) in NestJS?

By using the @CrossOrigin() decorator
By configuring CORS in the nest-cli.json file
By setting CORS headers in middleware
By using the @EnableCors() decorator

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What is the purpose of the @Injectable() decorator in NestJS?

It indicates that the class is a module
It indicates that the class is a controller
It indicates that the class is a service
It indicates that the class is a middleware

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Which of the following is true about interceptors in NestJS?

Interceptors can only modify request data
Interceptors execute before guards in the request pipeline
Interceptors cannot be used for logging
Interceptors are only used for error handling

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What is the purpose of a service in NestJS?

To define application routes
To encapsulate business logic and share data between components
To handle HTTP requests
To manage database connections

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What does NestJS use as its primary programming language?

Java
TypeScript
Python
Ruby

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What is the purpose of pipes in NestJS?

To define data models
To handle HTTP requests
To transform data between the client and server
To validate input data

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What is the purpose of dependency injection in NestJS?

To manage HTTP requests
To optimize database queries
To inject dependencies into components
To handle file uploads

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What is Dependency Injection (DI) in NestJS?

A way to inject dependencies into components
A method for executing asynchronous tasks
A data encryption technique
A form of HTML injection vulnerability

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Which decorator is used to define a controller in NestJS?

@Service
@Component
@Controller
@Module

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What is the primary language used in NestJS development?

Java
Python
TypeScript
PHP

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Which of the following is NOT a valid HTTP method in NestJS?

GET
DELETE
PATCH
UPDATE

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What does interception enable in NestJS?

Request validation
Response transformation
Error handling
Dependency injection

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What is the purpose of a controller in NestJS?

To define application routes
To manage database connections
To handle middleware
To encapsulate business logic

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What is the purpose of guards in NestJS?

To validate request data
To handle HTTP responses
To implement authentication and authorization logic
To define application routes

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Which of the following is NOT a valid lifecycle hook in NestJS?

onInit
afterContentInit
onModuleInit
ngOnInit

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How can you configure logging in NestJS?

By using the @Logger() decorator
By setting up a logging provider in the module
By configuring logging in the nest-cli.json file
By using the console.log() function

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What does the @Module() decorator signify in NestJS?

It defines a service
It defines a controller
It defines a module
It defines a component

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What is the primary purpose of guards in NestJS?

Data validation
Error handling
Authentication and authorization
Request routing

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Which command is used to create a new NestJS application?

ng new
nest new
npm create nest
create-nest-app

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What is NestJS primarily built on top of?

Express.js
Django
Flask
Laravel

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Which of the following is true about providers in NestJS?

Providers are only used for database operations
Providers are singletons by default
Providers cannot be injected into other components
Providers are only used for logging

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