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WithoutBook LIVE Mock Interviews ExtJS Related interview subjects: 19

Interview Questions and Answers

Know the top ExtJS interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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Know the top ExtJS interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Interview Questions and Answers

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Intermediate / 1 to 5 years experienced level questions & answers

Ques 1

What are major Web browsers supported by Ext JS framework?

* Windows® Internet Explorer® version 6 and later.
* Mozilla Firefox version 1.5 and later (PC and Macintosh).
* Apple Safari version 2 and later.
* Opera version 9 and later (PC and Mac).
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Ques 2

Where ExtJS extended from?

Ext JS as a project to extend the functionality that the YUI Library.A key aspect of the YUI Library is the cross-browser support.The Extjs framework is fully object oriented and extensible. Because it's written in the JavaScript language.
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Ques 4

What is parent class for all stores in extjs? how many stores exists?

Ext.data.Store is parent class for all stores.
A Store object uses its configured implementation of DataProxy to access a data object unless you call loadData directly and pass in your data.
subclasses for Store:
GroupingStore, JsonStore, SimpleStore
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Ques 8

What is purpose of loadData() in store?

store.loadData( Object data, [Boolean append] ) : void
Loads data from a passed data block and fires the load event.
loadData(storeData,false); False to replace the existing records cache.
loadData(storeData,true) : True to append the new Records rather than replace the existing cache.
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Ques 9

What is vtype?

The validations provided are basic and intended to be easily customizable and extended.
Few vtypes provided by extjs are as below:
emailText : String, The error text to display when the email validation function returns false
alphanumText : String, The error text to display when the alphanumeric validation function returns false
urlText : String, The error text to display when the url validation function returns false
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