Before you proceed to the next chapter, make sure you can answer these questions to your satisfaction:

• What is a root window?
• What is the main loop?
• How do you create a root window?
• What are widgets? How do you create widgets in Tkinter?
• Can you list or identify all available widgets in Tkinter?
• What are geometry managers used for?
• Can you name all the available geometry managers in Tkinter?
• What are events in a GUI program?
• What are callbacks? How are callbacks different from regular functions?
• How do you apply callbacks to an event?
• How do you style widgets using styling options?
• What are the common configuration options for the root window?