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52 interview questions on Nest.jsfor developers (2025)

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

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52 questions
Easy
13 votes594 runs0 comment

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

Back-end developer
NestJS
decorators
nest
Axelat Sep 6, 2023
Medium
10 votes596 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
8 votes593 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 votes559 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 votes592 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
4 votes561 runs0 comment

Nest module lifecycle methods execution order

Back-end developer
NestJS
nest
lifecycle
Axelat Sep 6, 2023
Easy
3 votes554 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 votes546 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 votes128 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 vote542 runs0 comment

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

Back-end developer
NestJS
nest
circular reference
Axelat Sep 6, 2023
Easy
1 vote535 runs0 comment

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

Back-end developer
NestJS
nest
dependency injection
Axelat Sep 6, 2023
Easy
1 vote523 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 vote400 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 vote193 runs0 comment

Access the `findAll()` method in NestJS

Back-end developer
NestJS
nest
controllers
routes
Axelat Sep 6, 2023
Easy
1 vote183 runs0 comment

Create a new module in Nest.js

Back-end developer
NestJS
nest
command
Axelat Sep 6, 2023
Medium
1 vote43 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 vote37 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 vote577 runs0 comment

Explain why modules are used in Nest.js

Back-end developer
NestJS
nest
modules
Axelat Sep 6, 2023
Medium
0 vote558 runs1 comment

What is an interceptor in Nest.js?

Back-end developer
NestJS
nest
interceptor
Axelat Sep 6, 2023
Medium
0 vote553 runs0 comment

How to make a Nest.js module global

Back-end developer
NestJS
nest
decorators
Axelat Sep 6, 2023
NestJS tests