General information usage of AEM in large projects

1) Core java

 Collection

 String manipulations

 Object oriented concepts,interfaces,Inheirtance

2) JSP - JSP directives

         Implicit objects in jsp

         CUstom tag creation in jsp

3) Servlets- WEB-INF

             Lifecycle, doget,dopost.....

   Youtube==> Javabrains by kasuhik

UI 

Javascript programming , Jquery, HTML, HTML 5

Full stack ==> Javas + UI (ANgular or NOde js)

2 kinds of AEM dev

1) Backend AEM dev ==> OSGI bundles,services,component dvelopement

2) Frontend AEM dev ==>  Getting the initial design embedding to AEM, Maniuplating of AEM

In large AEM projects

1) UI or UX ( User experience team ==> static website==> Responsive frameowrk) ==> Bootsrap, LESS,SASS,JS)

2) Embed the UI into AEM and ensure that static website works properly when integrated to AEM

3) Create dynamic & authorable components,dialogs,workflows...

4) Integrate with upstream & downstream systems ==> OSGI bundles..( components, configurations,services....)