No one in the world can give you the guarantee that attending the session will automatically give you an ITA.
However, the chances are high, especially if your NOC is in their in-demand occupations list (which has recently been updated)
It's fine if your degree NOC is not the same as your job experience NOC
Usually NBPNP asks you to submit your CV when you are registering for the session, so you can bring that along with you when you attend. In my case, when I attended the last info session in Dubai in March, I only brought along my CV, Emirates ID, and a printout of the email confirming my attendance for the session. Some people in the previous sessions brought a filled out EOI, copies of their degrees, WES evaluation reports, and IELTS.
The session is compiled of 2 parts, with an optional 3rd part.
Part 1: NBPNP representatives talk for around an hour about NB and the cities/towns of NB. They talk about the way of life, cost of living, job opportunities,healthcare, education, etc. They explain the process for the NBPNP, also mention the AIPP process, and then the CIC process once you receive nomination. This consists of videos and PowerPoint presentation
Part 2: Question and answer session, about 30-45 minutes, where you can ask anything regarding the process, jobs, healthcare, etc.It helps if you have specific concerns that you want to bring up. Just make a list of questions that you may want to ask. The representatives are very friendly and approachable. Some of them are even willing to stay and talk with you after the session has ended.
Part 3: Interviews by designated employers. This can take place before the session or after the session, or both. Depends on which employers show up for the session. For the one my husband and I attended, there were supposed to employers from IT companies present, however that changed at the last minute, and only a few employers from the food industry came. Those attendees who had experience in the food industry did have interviews, both the day before the session and also after the session.