You can ref some questions such as:
What do you think makes a good marketer from you?
Why do you think our company is successful on the market?
What marketing activities would you suggest to do to our marketing department in order to improve our brand building?
Have you ever heard about Guerrilla marketing?
What marketing media are the most effective nowadays from your point of view?
What is your position in the market at the moment? And what about the position of our company?
Can you define marketing mix?
If you should present yourself on a conference in a creative atypical way. What would you say about yourself?
and other questions from: Marketing interview questions