Could anyone please guide me what type of QT related questions are asked in interviews. Any book that I should have a look at? or any questions that I must find answers for.
Qt is a pretty big library... The interview is probably aimed at determining how familiar you are with Qt in general and specifically the parts of Qt you will be working with.
If you've never written a Qt application, I suggest you get cracking. It is nice, but has a learning curve that is a little large for a quick lookover. The Trolltech website has a good number of getting started tutorials also...
You also have to get used to the build process -- it is unique. The moc preprocessor is what gives Qt classes their superpowers.
I did write programs in QT but it was three years ago. Havent done any QT programming after that at all so I have almost forgotten it. Would you be able to narrow down few topics you think may be important.