1) Informatica 7x, 8x, 9x architecture, (need to explain about SOA etc)2) Can you install multiple instances of powercenter on same host? if you can, then how will you invoke different instances from a client since you provide same host name? configuring different ports is not the right answer.3) Can you invoke a mapplet variable from a worklet? and vice-versa? Can you use a mapping variable inside a mapplet? and all such combinations!4) different types of partitions. In depth usage of each partitions and different scenarios(need to provide examples where you have used them in your project, not just the concepts)5) dynamic cache, and dynamic partitioning questions6) Configuring grid on informatica server, configuring domains, pmrep command usage etc.I am not gonna get into more details, basically they are gonna ask everything and anything! These guys know the product in and out, so be prepared for anything! They were very keen on my knowledge of Powerconnect for Tibco/SAP etc but i had never used them in a project even though i had working knowledge