The first question, was explaining about work profile which was good start to demonstrate technical capabilities and make good impression of expertise in domain and technologies. ( this is what we already write in our resume/profile, but it was chance given to explain out yourself). Next question was to explain out current project architecture and implementation on big board. Here, had interactive session for 5-10 mins on process flow, different pros and cons of architecture design and explaining out how this design works with actual use cases. ( This works out to be good demonstration for what currently doing, so started with explaining project architecture SOA based layered architecture, emphasizing more on J2EE core design pattern, GOF design pattern for creational, behavioral and structural, also talking of solution components and how they are integrated like EJB, Webservices, JMS, Database, Quartz batch scheduler. Next questions was sort in debate mode on clustering (application running on multiple server) and how application works. More specifically on batch scheduler running in cluster environment. Expectation was high level explanation how Quartz scheduler handlers cluster deployment. Next question was on making MQ messages transactional in synchronous communication environment. Let's say I have an application which need to send out messages to two databases oracle and sybase, part of record is written in oracle remaining part of same message goes in sybase, so let's say if sybase transaction failed then how would you roll back whole transaction so that data in oracle is not inconsistency with sybase database