My younger daughter is interviewing for internships at the moment, and as part of the course she is doing they have prepared them for interviews, including checking out their clothing. She has a presentation today and then an interview so she is wearing a black pant suit, with a shirt (pink and white stripes) which is like a mans shirt but with a ruffle in the front (she has the skirt too, and has worn that with black tights and black shoes), and black dress shoes. She is also wearing a dress coat over the top but we live in Canada and it's still chilly
I think it's acceptable these days for women to wear a pants suit instead of a skirt.