SHarePoint has timer job "Databases used by SharePoint have fragmented indices." automatically rebuild indexes then do we need to create DB maintenance plan to rebuilding index as per below article https://technet.microsoft.com/en-us/library/cc262731(v=offic

No, MS SQL and SharePoint should take care of same

Thanks for your prompt answer. My question is SharePoint has timer job which rebuild index then is it required to configure maintenance plan for rebuilding index in SQL Server.