I agree with Rafdaman. Questions are very basic and simple. My interviews all started with "tell me about yourself." No technical questions and no need to prepare to prove your proficiency i.e. they will NOT ask you about composition of gutta purcha or what color is file size 35.

Although, I read that Case University requires you to prepare a presentation consisting 8 to 10 root canal cases you have done.
If you would like to prepare to make yourself feel more confident, however, feel free to use the following possible question list:
Tell me about yourself and your family
Why Endo? When did you decide?
What other programs did you apply to? What other interviews? Have you heard from another program?
How many RCTs have you done? How do you know endo if you have done only # of RCTs?
What are the treatment modalities in endodontics?
What do you think the definition of Endodontics is?
What do you see in the field of Endodontics in 10 years from now?
Why do you want to come to our program?
Why should we select you among 100 to 150 applicants? What do you bring to the table that others don't?
What are your strengths and weaknesses?
Do you plan to become board certified when you graduate?
What research have you done? what would you like to investigate?
What do you plan to do if you don't get in?
What are your goals?
Did you apply to 2 and/or 3 year programs? why or why not?
Do you plan to teach? in what capacity?
What are your interests? what do you do in your free time?
Where are you from?
Are you a team player?
How do you deal with adversity?
If you had a problem with someone in your group, how would you handle it? What would you do if that didn't work?
Do you consider yourself more a leader or a follower when working in a group setting?
How will you contribute to our program?
Who has been the biggest influence on your career choice?
What is the best decision you have made? what is the worst?
Have you ever seen an endodontic surgery?
How did you learn about our program?
Who have you learned the most from and why?
Hypothetically, if you could invite 3 people dead/alive to dinner, who would it be?
If your fellow resident was not doing his share of work, what would you do?
Name five dental journals.
Name three non-dental journals
What do you expect to get from our program?
Any questions?
I hope this helps. Good luck!