CRUD operations in NestJS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does CRUD stand for in software development?

CRUD stands for Create, Read, Update, and Delete. These are the four basic operations to manage data in applications.

beginner

In NestJS, which decorator is commonly used to define a method that handles HTTP POST requests for creating data?

The @Post() decorator is used in NestJS controllers to define a method that handles HTTP POST requests, typically for creating new data.

intermediate

How does NestJS help organize CRUD operations in an application?

NestJS organizes CRUD operations using controllers for routing HTTP requests and services for business logic, keeping code clean and modular.

beginner

What HTTP method and NestJS decorator pair is used to update existing data?

The HTTP PUT or PATCH method is used to update data. In NestJS, @Put() or @Patch() decorators define methods handling these requests.

intermediate

Why is it important to separate controller and service logic in NestJS when implementing CRUD?

Separating controller and service logic improves code clarity, makes testing easier, and allows reusing business logic across different parts of the app.

Which NestJS decorator is used to handle HTTP GET requests for reading data?

A @Post()

B @Delete()

C @Put()

D @Get()

The @Get() decorator is used to define methods that handle HTTP GET requests, which are typically used to read or retrieve data.

What HTTP method is typically used to delete data in a RESTful API?

A POST

B GET

C DELETE

D PUT

The DELETE HTTP method is used to remove data from the server.

In NestJS, where should the main business logic for CRUD operations be placed?

A In the service

B In the controller

C In the module

D In the main.ts file

Business logic should be placed in services to keep controllers focused on handling requests and responses.

Which HTTP method and NestJS decorator pair is used to create new data?

A GET and @Get()

B POST and @Post()

C PUT and @Put()

D DELETE and @Delete()

POST requests, handled by @Post() in NestJS, are used to create new data.

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

A To delete data

B To create data

C To update data

D To read data

The @Delete() decorator defines a method that handles HTTP DELETE requests to remove data.

Explain how CRUD operations are structured in a NestJS application.

Think about where requests are handled and where the data logic lives.

Describe the role of HTTP methods in CRUD operations and how NestJS maps them with decorators.

Match each CRUD action with its HTTP method and NestJS decorator.