Built-in HTTP exceptions in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to throw a 404 Not Found exception in a NestJS controller.

NestJS

throw new [1]();

Drag options to blanks, or click blank then click option'

ANotFoundException

BBadRequestException

CUnauthorizedException

DForbiddenException

Attempts:

3 left

💡 Hint

Common Mistakes

Using BadRequestException instead of NotFoundException.

Confusing UnauthorizedException with NotFoundException.

The NotFoundException is used to throw a 404 error in NestJS.

2fill in blank

medium

Complete the code to import the built-in HTTP exceptions from NestJS.

NestJS

import { [1] } from '@nestjs/common';

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AInjectable

BController

CModule

DHttpException

Attempts:

3 left

💡 Hint

Common Mistakes

Importing Controller or Module instead of HttpException.

Forgetting to import from '@nestjs/common'.

The HttpException class is the base for all built-in HTTP exceptions in NestJS.

3fill in blank

hard

Fix the error in throwing a 400 Bad Request exception with a custom message.

NestJS

throw new [1]('Invalid input');

Drag options to blanks, or click blank then click option'

ANotFoundException

BBadRequestException

CUnauthorizedException

DForbiddenException

Attempts:

3 left

💡 Hint

Common Mistakes

Using NotFoundException for bad input errors.

Using UnauthorizedException for validation errors.

The BadRequestException is used to indicate a 400 error with a custom message.

4fill in blank

hard

Fill both blanks to throw a 403 Forbidden exception with a custom message.

NestJS

throw new [1]('[2]');

Drag options to blanks, or click blank then click option'

AForbiddenException

BUnauthorized

CBadRequestException

DNotFoundException

Attempts:

3 left

💡 Hint

Common Mistakes

Using UnauthorizedException instead of ForbiddenException for 403 errors.

Not providing a message string.

The ForbiddenException throws a 403 error. The message can be any string, here we use 'Unauthorized'.

5fill in blank

hard

Fill all three blanks to throw a 401 Unauthorized exception with a custom message and import it correctly.

NestJS

import { [1] } from '@nestjs/common';

throw new [2]('[3]');

Drag options to blanks, or click blank then click option'

AUnauthorizedException

BForbiddenException

CBad credentials

DNotFoundException

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the wrong exception class.

Using a message that does not explain the error.

Import and throw UnauthorizedException with a message like 'Bad credentials' to indicate a 401 error.