TCP transport in NestJS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is TCP transport in NestJS?

TCP transport in NestJS is a way to send and receive messages over the TCP protocol, allowing microservices to communicate using TCP sockets.

beginner

How do you create a TCP microservice in NestJS?

You create a TCP microservice by using the Transport.TCP option in the createMicroservice() method of the NestJS app.

beginner

What is the role of port in TCP transport configuration?

The port specifies the TCP port number where the microservice listens for incoming connections.

intermediate

How does NestJS handle message patterns with TCP transport?

NestJS uses decorators like @MessagePattern() to listen for specific message patterns sent over TCP and respond accordingly.

intermediate

Why is TCP transport suitable for microservices?

TCP transport is suitable because it provides reliable, ordered, and error-checked delivery of messages between microservices over the network.

Which NestJS method is used to create a TCP microservice?

A createMicroservice()

B createTcpClient()

C startTcpServer()

D initTcpTransport()

The createMicroservice() method is used with Transport.TCP to create a TCP microservice.

What does the port option specify in TCP transport?

A The TCP port number to listen on

B The IP address to connect to

C The message pattern to handle

D The protocol version

The port option defines the TCP port number where the microservice listens for connections.

Which decorator listens for messages in a TCP microservice?

A @TcpListener()

B @TcpHandler()

C @EventPattern()

D @MessagePattern()

@MessagePattern() is used to listen for specific message patterns in TCP transport.

TCP transport in NestJS is mainly used for:

A Serving static files

B Microservice communication

C Database connections

D Frontend rendering

TCP transport is designed for microservice communication over TCP sockets.

Which of the following is NOT a feature of TCP transport?

A Reliable message delivery

B Ordered message delivery

C Broadcast messaging

D Error-checked communication

TCP transport does not support broadcast messaging; it is point-to-point.

Explain how to set up a TCP microservice in NestJS and how it handles incoming messages.

Think about how NestJS creates and listens on TCP sockets.

Describe why TCP transport is a good choice for microservice communication in NestJS.

Consider the benefits of TCP protocol for sending messages.