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ExtJS Interview Questions and Answers

  Difficulty Level: AllBeginnerIntermediateExperienced/Expert

Ques 1. Why do we need javascript Library?

Ques 2. Why did you choose Ext JS?

Ques 3. What are major Web browsers supported by Ext JS framework?

Ques 4. Integration of Web development server-side frameworks with Ext JS?

Ques 5. Where ExtJS extended from?

Ques 6. Extjs Ajax implementation?

Ques 7. Do you have any advice for developers using ExtJS for the first time?

Ques 8. How to access DOM element using EXTJS?

Ques 9. What is the purpose of Element Object in ExtJS?

Ques 10. What is syntax for Extjs Button click event?

Ques 11. What is use of Ext.onReady() function ?

Ques 12. For example, to show our message when any paragraph in our test page is clicked, what is the ExtJS code on paragraph click?

Ques 13. List out the extjs library files to include in JSP page?

Ques 14. List out the css file required to apply Extjs Theme property?

Ques 15. What is purpose of MessageBox?

Ques 16. Write syntax for MessageBox show() method?

Ques 17. What is method to Update the message box body text for MessageBox?

Ques 18. What is a widget?

Ques 19. What is parent class for all stores in extjs? how many stores exists?

Ques 20. How to handle event for a extjs component?

Ques 21. How to find no of records in a store?

Ques 22. How to handle exception while loading datastore?

Ques 23. How to handle updates for store changes?

Ques 24. What is the purpose of each() in store?

Ques 25. How to get modified records using store object?

Ques 26. How to get record using index?

Ques 27. How to get record using id?

Ques 28. What is the purpose of load() in store?

Ques 29. What is purpose of loadData() in store?

Ques 30. How many types of layout managers exist in extjs?what are they?

Ques 31. How we can apply pagination in grid panel?

Ques 32. What is xtype?

Ques 33. What is vtype?

Ques 34. How to get record object from store?

Ques 35. What is the purpose of Load mask?

Ques 36. What is purpose of renderer in grid panel?

Ques 37. How to get selection model used in a grid panel?

Ques 38. How to stop editing a record?

Ques 39. How to start editing a record?

Ques 40. How to commit a record modification?

Ques 41. What is use of combo select event function?

Ques 42. How to get a value of textfield or combo box?

Ques 43. How to apply css on select of combo box?

Ques 44. What are components required for grid panel?

Ques 45. How to hide the column in grid panel?

Ques 46. How to register callbacks to the load and exception events of the JsonStore?

Ques 47. How to write extjs decode()?

Ques 48. Why did you choose Ext JS?

Ques 49. What features could we add to Ext to make building a rich application like PLANet easier in the future?

Ques 50. Difference between ExtJS and JQuery?

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