To Install a Service Pack in AEM, go to Tools > Deployment > Packages. Click Upload and select the service pack zip file. Adobe Experience Manager (AEM) Blogs How to Install a Service Pack in AEM?
The Technology Stack of Adobe Experience Manager (AEM) consists of Java Content Repository (JCR), Apache Jackrabbit Oak, OSGi and Structure within the Repository. Adobe Experience Manager (AEM) Blogs The Technology Stack of Adobe Experience Manager (AEM)