We ask scenario questions and also probe further to get evidence, so we are able to make informed recruitment decisions.
For example, rather than asking if you work well in teams, we can ask you to tell us about a time you worked in a team, what the objective of the team was, your role in the team, what obstacles you faced, what would you have done differently etc.
Another option especially for fresh graduates is to group candidates and give them case study to discuss. We will monitor how they interact, the quality of their outcomes, etc to evaluate some of the competencies we are looking for.
To improve, read about an organization before attending the interview. Prepare well, rehearse to improve your presentation skill, etc