2.How the applications looks on the access point once deployed in the qlikview server
When it comes to data validation what ever the expressions or sql queries using in qlikview compare with the data sources . all the values are in sync. in big organisations testing is done by the different team. once again it all depends on the company and how many resources are available.
When u deploy the application it looks good in the desktop level but once u deploy to the server it may not look as u expected. so before deploying the application to the access point try to view the application in the Webview mode.