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52 interview questions on NestJSfor developers (2025)

Test your technical skills before an interview of NestJS with 52 corrected questions. Beginner, Intermediate or Expert level.

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52 questions
Easy
13 votes644 runs0 comment

How to declare a class as a controller in Nest.js

Back-end developer
NestJS
decorators
nest
Axelat Sep 6, 2023
Medium
11 votes647 runs0 comment

How to make an `ExceptionFilter` global so that it applies to your entire application in NestJS

Back-end developer
NestJS
nest
filters
Axelat Sep 6, 2023
Easy
10 votes643 runs0 comment

What is the main responsibility of a pipe in Nest.js?

Back-end developer
NestJS
nest
pipes
Axelat Sep 6, 2023
Easy
5 votes642 runs0 comment

Which decorator is used to associate a Guard with a route or controller in Nest?

Back-end developer
NestJS
decorators
guards
Axelat Sep 6, 2023
Easy
5 votes607 runs0 comment

How to define a service or component that can be injected in Nest.js

Back-end developer
NestJS
nest
decorators
Axelat Sep 6, 2023
Easy
4 votes611 runs0 comment

Nest module lifecycle methods execution order

Back-end developer
NestJS
nest
lifecycle
Axelat Sep 6, 2023
Easy
3 votes603 runs0 comment

What is the main use of the `OnModuleInit` interface in Nest.js?

Back-end developer
NestJS
nest
module
Axelat Sep 6, 2023
Easy
2 votes594 runs0 comment

Explain the use of the `switchToHttp` or `switchToWs` methods in a Nest.js guard or interceptor.

Back-end developer
NestJS
nest
guards
interceptors
Axelat Sep 6, 2023
Hard
2 votes148 runs0 comment

Which of the following is not a predefined Nest.js interceptor?

Back-end developer
NestJS
nest
interceptors
Axelat Jun 18, 2024
Easy
1 vote596 runs0 comment

Explain why you would use `forwardRef` in Nest.js.

Back-end developer
NestJS
nest
circular reference
Axelat Sep 6, 2023
Easy
1 vote582 runs0 comment

Explain the use of the @Optional() decorator in Nest.

Back-end developer
NestJS
nest
dependency injection
Axelat Sep 6, 2023
Easy
1 vote570 runs0 comment

What is the role of the `@Body()` decorator in this NestJS code snippet?

Back-end developer
NestJS
nest
decorators
Axelat Sep 6, 2023
Medium
1 vote448 runs0 comment

What is the main purpose of asynchronous providers in Nest.js?

Back-end developer
NestJS
nest
async
Axelat Sep 6, 2023
Easy
1 vote212 runs0 comment

Access the `findAll()` method in NestJS

Back-end developer
NestJS
nest
controllers
routes
Axelat Sep 6, 2023
Easy
1 vote202 runs0 comment

Create a new module in Nest.js

Back-end developer
NestJS
nest
command
Axelat Sep 6, 2023
Medium
1 vote47 runs0 comment

When would it make sense to use a custom decorator rather than an integrated Pipe?

Back-end developer
NestJS
nest
decorators
Axelat Sep 6, 2023
Easy
1 vote44 runs0 comment

How to declare a value provider in Nest.js?

Back-end developer
NestJS
nest
providers
Axelat Sep 6, 2023
Easy
1 vote39 runs0 comment

What is the specific role of `useFactory` in the provider declaration?

Back-end developer
NestJS
nest
provider
Axelat Sep 6, 2023
Hard
0 vote626 runs0 comment

Explain why modules are used in Nest.js

Back-end developer
NestJS
nest
modules
Axelat Sep 6, 2023
Medium
0 vote606 runs1 comment

What is an interceptor in Nest.js?

Back-end developer
NestJS
nest
interceptor
Axelat Sep 6, 2023
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