File /libs/cq/ui/widgets/source/widgets/wcm/DamAdmin.Actions.jsFor deleting a asset,  this method gets calledCQ.wcm.DamAdmin.deleteAsset which further calls CQ.wcm.DamAdmin.internalDeleteAssetLIne 162 is the success callback once these assets are deleted

For service user, you can refer https://helpx.adobe.com/experience-manager/using/aem63_slingmodel.htmlhttps://helpx.adobe.com/experience-manager/using/aem63_slingmodel.html https://helpx.adobe.com/experience-manager/6-3/sites/administering/using/security-service-users.html Can you elaborate what are...

Anonymous user will not have access to /apps in publish also it will blocked at dispatcher if you are directly accessing this path.You can create a system user and use service user mapper to access it.But I would still like to why proper OSGI config won't work your user case?

It's probably an existing issue with 6.3, have seen others reporting this as well. Fix might be available in next SP2 for AEM 6.3 but raise a day care ticket. They will be able to provide you fix for it.

You can use these properties to get status of a page.Also, speaking of how these are displayed in OOTB sites structure.Refer to the JSP here : /libs/cq/gui/components/coral/admin/page/columnpreview/columnpreview.jsp (line 166-205)

If you have page path, you can make basic javascript ajax to jcr:content path of that page and look for these properties

You can configure replication agents for content with user access [0] to specific serverOnce that is done, Use replicator API where you can use configure replication agent ( will be defined in ReplicationOptions)[1] in workflow code.[0] http://aemfaq.blogspot.in/2013/05/how-to-configure-replication-...

As long you have correct config deployed to your instance, externalizer code work fine. You may want to ensure that configs in felix are deployed properly,Also try using this externalizer.externalLink(resolver, "mydomain", "/my/page") for any custom domain

There will be multiple pages under a cq:Page node but when you request a page content only under cq:PageContent (jcr:content) gets rendered for that requested resource.Once resource is resolved, It won't evaluate all cq:Page node under it.Three things:What is current value you have set ?How many nod...

Not sure if you have read the linked article completely, For a particular image, you define multiple tags. Each tag will have device width + image source urlWhen page load on a device, based on a device width browser will pick on correct url and load only that image