What is the root class for all Ext classes?

What is the method to instantiate a class in ExtJS 4.*?

The ______ validation verifies if the given value matches the given regular expression.

What is one advantage of using xtype to create objects in Ext?

Which one of the following is the correct syntax in Ext.js to make an ajax request?

What is the correct syntax to enable gridpanel text selection?

Which of the following is not an Ext layout type?

What object render itself to the document body?

How is Ext JS licensed?

Which of the following is a required config option for grid column?

What plugin is required for cell editing?