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Sree SalesforceSree Salesforce 

what is the difference between rerender and action region

MissedCallMissedCall
Stop spamming with your interview questions
Rajesh PotnuruRajesh Potnuru
Hi Sri,

reRender - ID. Particular block will be refreshed.

Action Region: An area of a Visualforce page that demarcates which components should be processed by the Force.com server when an AJAX request is generated. Only the components in the body of the <apex:actionRegion> are processed by the server, thereby increasing the performance of the page.


Thanks & Regards,
Rajesh Potnuru

* Did this answer your question? If not, let me know what didn't work, or if so, please mark it solved.
Ankit AroraAnkit Arora
For action region : https://www.salesforce.com/us/developer/docs/pages/Content/pages_compref_actionRegion.htm

For rendering hope these will help : https://developer.salesforce.com/forums/ForumsMain?id=906F0000000977BIAQ
http://help.salesforce.com/apex/HTViewSolution?id=000003854&language=en_US