WebSockets

The video tutorial introduces the Websocket protocol for creating real-time applications with Node.js. It explains the concept of full duplex communication, allowing bidirectional data exchange between client and server, unlike HTTP. The tutorial highlights the importance of persistent connections in Websockets, using a chat application as an example. It concludes with a brief on implementing Websockets using the socket.io library.

What is the primary purpose of using Websockets in real-time applications?

• To reduce server load

• To improve data encryption

• To enable asynchronous data processing

• To allow bidirectional communication

How does Websocket communication differ from HTTP requests?

• HTTP requests are bidirectional

• HTTP requests are faster

• Websockets require more bandwidth

• Websockets maintain a persistent connection

What is meant by 'full duplex communication' in the context of Websockets?

• Communication can only be initiated by the server

• Communication is limited to text messages

• Data can be sent and received simultaneously

• Only one client can connect at a time

In a chat application using Websockets, what happens when a client sends a message to the server?

• The server stores the message in a database

• The server sends the message back to the sender only

• The server broadcasts the message to all connected clients

• The server ignores the message

What is the role of the server in a Websocket-based chat application?

• To initiate all communications

• To store all chat history

• To manage client connections and relay messages

• To encrypt all messages

Which library will be used to implement Websockets in the next lesson?

• Express.js

• Socket.IO

• React.js

• Django

What is a key benefit of using Websockets for real-time applications?

• Reduced latency in data transmission

• Increased server processing power

• Simplified client-side coding

• Enhanced data security