Tutorial Links
Java:
https://www.javatpoint.com/java-tutorialhttps://www.tutorialspoint.com/java/
https://www.w3schools.com/java/
.Net (C#):
https://docs.microsoft.com/en-us/dotnet/csharp/https://www.javatpoint.com/c-sharp-tutorial
https://www.tutorialspoint.com/csharp/
https://www.w3schools.in/csharp-tutorial/
HTML and CSS:
https://www.tutorialspoint.com/html/https://www.javatpoint.com/html-tutorial
https://www.w3schools.com/html/
https://www.javatpoint.com/css-tutorial
https://www.w3schools.com/css/default.asp