Dear Prabjot,
Yes this is also a window kind of interview but obviously you will be asked to sit and relax. My interview lasted 35-40 mins. They had doubt about my work experience. And she started straight from this point and then dragged me to other things those were mentioned in the application, like education, experience, etc. You just be calm and answer questions truthfully but it should be to the point and should be consistent with the application form. Just correct anything if you have submitted something wrong by mistake, like your age, or DOB or whatever. I mean if there was an error at the time of application, you have this chance to rectify. Most important "be confident". And try to listen to the VO carefully so you understand what they are asking and answer accordingly.
Hope this helps,
Best of luck for your interview.
PS: Caips notes take approx 8 weeks, very rarely you get them early. So there is no point of ordering CAIPS at this point.