Actually, its your ability to just conversationally talk about these that will be "graded' in your oral interview. Are you "conversant" with these areas? Can you speak casually but Knowingly about these.

My best advice is for you to write a 2 minute elevator speech about these and all other areas of content that you expect to come up in the interview. Then get comfortable delivering your elevator speeches. ANd if pressed, you can then get into the depth of the material.

I have interviewed and hired as well as been the interviewee I always look at it like this:

"displaying ease of speaking, and comfort in a stressful interview suggests confidence, poise and competence on the job."

milo