What is the name of the object a developer would use to create a group of radiobuttons in which only one radio button can be selected at a time?

Why would a developer use a JsonPStore instead of a JsonStore?

Why would a developer use Ext.fly() instead of Ext.get()?

What is the name of the event that fires when all the DOM objects have been loaded but before all images are loaded and before the onLoad event?

The _____ organizes its children horizontally across the container.

True or False. There can only be one locked column.

Which one of the following events on an Ext.data.store object fires AFTER the store is loaded?

The ________ is a helper. Usually, it is used to load some inline data into a store. Its contents are lost in every page refresh, it can be useful to load temporary data.

Which of the following is not an Ext.form.field object?

True or False. The constrainTo option is only applicable to 'floating' components.

Which of the following xtype(s) defines a grid panel?