The core component that makes up the "graphical interface" on the Linux platform are the display server and a compositor.
The display server and compositor manages the application windows and draws them onto the screen. The standard display server had been X11 for many years, and is in the process of being replaced with Wayland (though there is a transitional system that allows X-dependent applications to use Wayland)
no
The GUI uses unnecessary resources.
Yes and no. Yes, Linux has a GUI. Dozens, in fact, all running on the X Windowing System. No, Linux is not BASED on a GUI. Only Windows really has the concept of an operating system "based" on a GUI. To Linux, the X Windowing System and whatever you run on top of it is just another application.
The Linux kernel itself does not include a GUI. However, most Linux distributions have one. Yes, Linux have a GUI.Today many kind of vendor available in Linux Like Redhat fedora,Ubuntu,Suse, Mandriva and many more. Those Linux version provide Cmd and GUI mode for work.
There are many differences between the Graphical User Interfaces of Windows and Linux. There are similarities as well. To be exact, Linux, itself has no GUI per se. The GUI(s) that you can use, and there are literally hundreds to choose from, are separate programs running under Linux. [speaking simply here]Linux itself is the core (kernel) of the Operating System, whereas the GUI, the file managers, web browsers, chat programs etc, are all applications that give the OS "features". With Windows you only have the included GUI, that is unless you install a modification such as WindowBlinds(TM). Linux, and many other POSIX compliant OS's can use many GUI, here is a brief listing and some links to GUI sites. KDE - The K Desktop Environment: http://kde.org/Gnome (Pronounced with a hard "Guh" as in Guh-Nome: http://gnome.org/Enlightenment: http://www.enlightenment.org/blackbox: http://sourceforge.net/projects/blackboxwmAfterStep: http://freshmeat.net/projects/afterstep/ and many more...
Not sure what your question is asking, other than the GUI is displayed by the desktop manager.
Component size is the size that a component appears in a GUI.
X Windows
gnome and kde
Yes
A public interface.
x windows