1. Yes, you can use the allowOverride attribute in the tag to prevent configuration settings in a Web. Config file from being overridden by a Web.Config file located below it
2.Yes, you can use the tag to prevent configuration settings in aWeb.Config file from being overridden by a Web.Config file located below it
3.If a Web. Config file exist at a particular level then all settings in the Web. Config file located above it are always ignored
4.You cannot have more than one Web. Config file in an ASP.NET application