TCP transport in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a TCP client in NestJS.

NestJS

const client = ClientProxyFactory.create({ transport: [1] });

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ATransport.GRPC

BTransport.HTTP

CTransport.REDIS

DTransport.TCP

Attempts:

3 left

💡 Hint

Common Mistakes

Using Transport.HTTP instead of Transport.TCP

Confusing Redis or gRPC transports with TCP

Transport.TCP is used to specify TCP transport in NestJS microservices.

2fill in blank

medium

Complete the code to set the TCP port to 3001.

NestJS

const microserviceOptions = { transport: Transport.TCP, options: { port: [1] } };

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A8080

B3001

C5000

D4000

Attempts:

3 left

💡 Hint

Common Mistakes

Using default port 8080 instead of 3001

Setting an invalid port number

Port 3001 is set here to specify where the TCP microservice listens.

3fill in blank

hard

Fix the error in the TCP microservice creation by completing the missing import.

NestJS

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

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ATcpService

BClientProxy

CTransport

DMicroserviceOptions

Attempts:

3 left

💡 Hint

Common Mistakes

Importing ClientProxy instead of Transport

Using a non-existent TcpService import

Transport must be imported from '@nestjs/microservices' to configure TCP transport.

4fill in blank

hard

Fill in the blank to create a TCP microservice on port 4000.

NestJS

const microservice = app.[1]Microservice({ transport: Transport.TCP, options: { port: 4000 } });

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Acreate

Blisten

Cconnect

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using connectMicroservice which returns the app instead of Microservice instance

Use createMicroservice to create the microservice instance.

5fill in blank

hard

Fill all three blanks to send a message with pattern 'sum' and data {a: 5, b: 3} using the TCP client.

NestJS

const client = ClientProxyFactory.create({ transport: Transport.TCP });
await client.[1]();
const result = await client.send({ cmd: '[2]' }, [3]).toPromise();

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

Alisten

Bsum

C{ a: 5, b: 3 }

Dconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Calling listen() instead of connect()

Using wrong pattern name

Passing data as a string instead of an object

First, connect the client with connect(), then send a message with pattern 'sum' and data object.