CGI Full Form is Common Gateway Interface. CGI to the standard setting for web services in order to interface with web programs to generate dynamic web pages. Such programs are called CGI. These are usually written in script language. However, a CGI can also be written in other programming languages such as Perl, C, Visual Basic, or java.
CGI programs form the common gateway for users and web servers to dynamically interact. For example, several HTML pages, which contain forms, make use of CGI program in order to process the data on submission. One of the drawbacks of CGI is, every time a script of CGI is executed, it starts a new process. This tends to slow down the server of busy websites to a great extent. However, using Java servlets or the server’s API would be a good solution for this inadequacy.