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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 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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What is the primary purpose of pipes in NestJS?

Data transformation
Handling HTTP requests
Validating input data
Defining application routes

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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 is the purpose of the @Controller() decorator in NestJS?

To define a service
To define a module
To define a middleware
To define a controller

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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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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 the purpose of DTOs (Data Transfer Objects) in NestJS?

To define database schemas
To encapsulate data validation logic
To define service interfaces
To manage authentication

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What does NestJS use as its primary programming language?

Java
TypeScript
Python
Ruby

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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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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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How can you configure authentication in NestJS?

By using the @Authentication() decorator
By defining middleware to handle authentication logic
By setting up a third-party authentication provider
By using the built-in AuthGuard class

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What is the purpose of serialization in NestJS?

To optimize database queries
To convert JSON data to class instances and vice versa
To encrypt sensitive information
To define API routes

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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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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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What does Dependency Injection (DI) enable in NestJS?

Better performance
Code reuse
Tight coupling
Simpler debugging

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What does serialization enable in NestJS?

Efficient database queries
Type checking
Conversion of JSON data to class instances and vice versa
Secure authentication

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

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

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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 core concept in NestJS?

Middleware
Components
Modules
Schemas

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What programming language does NestJS primarily use?

Python
JavaScript
TypeScript
Java

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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 role of guards in NestJS?

Data validation
Error handling
Authentication and authorization
Request routing

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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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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 does interception enable in NestJS?

Request validation
Response transformation
Error handling
Dependency injection

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What is NestJS primarily built on top of?

Express.js
Django
Flask
Laravel

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How can you handle errors globally in NestJS?

By using the @ErrorHandler() decorator
By defining an exception filter
By setting up a catch-all route
By using the try...catch statement in controllers

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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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