What can I say if an applicant asks for feedback on their interview?
You can provide information, which is related to their qualifications, and how those qualifications were evaluated. Avoid providing any information that is not job-related and was not considered in the evaluation of the interviewees.
Is it appropriate to suggest to an unsuccessful candidate who asks what they could do differently in the future that they might benefit from participating in an interviewing skills workshop?
This could be appropriate if you can give the candidate an example from the interview where it seemed from the application that they had a certain level of experience or skill but when it came to conveying it in the interview they had difficulty responding effectively to the interview questions. A suggestion that an interviewing skills workshop might provide them with some useful tools to assist them in conveying their skills and experiences more effectively in an interview situation could be helpful.