Question:What are adapters in ExtJs? 

The adapter is used to allow classes to work together when normally could not because of incompatible interfaces, by providing its interface to clients while using the original interface.

Question:What are vtypes in ExtJs? 

Complex type of validation is the vtype. This can be used to validate and restrict user input, and report back error message. Some of most common vtype are:

1. email
2. url
3. alpha
4. alphanum

Question:
What is SimpleStore() function in Extjs?
 

This is a function of Ext.data class. It is use to store data in the variable formatting similar to tabular data. For example
          var genres=new Ext.data. SimpleStore ({
                   fields:[‘id’,’genre’],
                   data:[[‘1’,’Comedy’],[‘2’,’Drama’],[‘3’,’Action’]]
         });

Question:What is xtype in Extjs? 

An xtype is just a reference to a particular Ext form component. xtype that defines what type of a field it is. Here are examples of the some common xtypes that are available to us:

1. textfield
2. timefield
3. numberfield
4. datefield
5. combo
6. textarea

Question:What is CSV? 

A comma-separated values (CSV) file stores tabular data (numbers and text) in plain-text form. CSV is a simple file format that is widely supported by consumer, business, and scientific applications. It might be used to transfer information from a database program to a spreadsheet.

Question:Define XML? 

XML stands for EXtensible Markup Language
XML is a markup language much like HTML
XML was designed to carry data, not to display data
XML tags are not predefined. You must define your own tags
XML is designed to be self-descriptive
XML is a W3C Recommendation

Question:List five data types in term of ExtJS? 

1. string
2. Integer
3. float
4. boolean
5. data

Question:What is store field type in ExtJS? 

store field type is a reference to a valid data store where our data lives. This field use to show data in combo box and grid panel that’s name is store.

Question:What is field type in ExtJS? 

Field type is used to configure the ExtJS object with name/value pair. Example of some common field types are, title, url, renderTo etc.

Question:What is region field type in ExtJS Viewport? 

Region field type is used to in ExtJS.ViewPort class for setting the regions: North, West, Center, East, and South.