@SwetaB  -   You can can store wsdl url/username/password etc in properties files and read them https://medium.com/bb-tutorials-and-thoughts/how-to-read-properties-file-in-java-6651fe2c6cbf    

@Viswa_vsu - Have look -   CUG Based Redirect- https://experienceleague.adobe.com/docs/experience-manager-64/administering/security/cug.html?lang=en Customizing Error Pages https://experienceleague.adobe.com/docs/experience-manager-65/developing/platform/customizing-errorhandler-pages.html?lang=en. ...

@AEMLearner-1989  - Check this you will have an idea about sling exporter after going through - https://experienceleague.adobe.com/docs/experience-manager-learn/foundation/development/develop-sling-model-exporter.html?lang=en  

@sriram_1  - Check this for reference -  https://gist.github.com/justinedelson/10878245   Thanks

@manisha594391  - @Saravanan_Dharmaraj  is right if you just need single instance instead of multiple once...but if you need to reviewer approve/reject in one shot (notification) with single WF instance definitely customize wf process step is needed...

@manisha594391  -Multi Resource Support only for AEM Page as per below reference  https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/multi-resource-support-not-working-for-workflow/td-p/359375   We can customize workflow process to enable Directory Level(Say for eg- Category-1...

@Saravanan_Dharmaraj  - Can you check local Maven Repo seems jar is missing as mentioned by @Saravanan_Dharmaraj   

@RooRue  - You can narrow query based on path/template  property=@jcr:content/cq:lastReplicationActionproperty.value=Activate   https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/how-to-search-for-only-pages-which-are-published-using/td-p/404949   hopes help you.   Thanks, Man...

@avvidya931  - Check the AEM Run Mode to determine its author/publish... Preview is custom made run mode on top of publish server. http://localhost:4502/system/console/status-slingsettings https://sourcedcode.com/blog/aem/how-to-check-all-active-run-modes-in-a-running-aem-instance  

@Nandheswara very old reference but have an look on JavaScript so u have a idea. http://experience-aem.blogspot.com/2015/02/aem-6-sp2-touch-ui-multi-field-component.html