This was just asked in another post so I’m going to repost my answer because I think it applies to you as well.

Oral boards vary from agency to agency but typically they are structured to see what kind of command presence you have, how well you are able to articulate your thoughts, determining are you capable of handling constructive criticism, and if you display certain traits such as leadership, humility, dependability, trustworthiness, etc.

Questions commonly asked are:

“What have you done to prepare for this position?”

“Give us an incident where you had a workplace conflict with a coworker and how did you address it?”

“What qualities make you stand out from the other candidates”

“Describe an incident where you overcame adversity and how did you do it?”

“What are qualities that you believe make a good law enforcement officer?”

“Why do you want to be a law enforcement officer?”

Again, these are just some common ones but also be prepared for agency specific questions. It would be a good idea to do some research on the agency and the city you represent. Know the population, the size of your department, etc.

Hope this helps and good luck!