Client Server Model

• What is the client-server model?

  A model for communication between client and server
• What protocol should you be familiar with in the client-server model?

  Websocket protocol
• Why is the Websocket protocol used?

  For real-time communication between client and server
• What does CRUD stand for?

  Create, Retrieve, Update, Delete
• How does REST relate to CRUD operations?

  It maps CRUD to database functions
• What SQL command corresponds to the POST method in REST?

  INSERT
• What SQL command corresponds to the GET method in REST?

  SELECT
• What SQL command corresponds to the DELETE method in REST?

  DELETE
• What SQL command corresponds to the PUT method in REST?

  UPDATE
• What is JSON?

  JavaScript Object Notation for data formatting
• How does JSON compare to XML?

  JSON is easier to read than XML
• What is XML?

  Extensible Markup Language for data encoding
• What is a key advantage of JSON?

  Easy to read with less code
• What is a key disadvantage of JSON?

  Limited range of data types
• What is a key advantage of XML?

  Greater flexibility in data types
• What is a key disadvantage of XML?

  Harder to read and requires more code
• What are the principles of the client-server model?


  • Sender and receiver roles
  • Client makes requests to the server
  • Server responds to client requests
  • Provides requested services
• What is the role of APIs in the client-server model?

  • Defines interaction between programs
  • Composed of standardized subroutines
  • Customizable for program interfaces
• What is the function of the Websocket protocol in APIs?

  • Creates a connection between client and server
  • Allows simultaneous data exchange
  • Enables real-time collaboration
• What is REST and its significance in networked applications?

  • Design methodology for database applications
  • Uses HTTP for CRUD operations
  • Efficient for implementing applications over networks