Self-efficacy is the ability of people to believe in themselves, in their abilities and their talents in order to face a challenge and rise up to it and solve it, so if the expectation of wether we will succeed when facing a challenge would be Self-efficacy.
He should try and get more experience within nursing and caring but talk about the skills he learned in food service that he can apply eg socialising, team work, etc. these skills are applicable anywhere. hope that helped