I'm an entry-level developer (college grad). I found a company that I am very interested in working for and I used my network to send them my resume (without knowing if they had any available positions that would fit my skills or not). They were interested, and I spoke on the phone with someone from their HR department, but the HR rep didn't really know details about what techie stuff I'd be doing.
Then, they contacted me about scheduling an face-to-face interview, and included a job title for my position, which is a bit different than my skills. (The job description for that job title was posted on their website.)
In other words, they saw my resume first and apparently liked the skills I had there, but they are officially interviewing me for a different type of position which I'm not really that qualified for (but I'm confident I could pick it up quickly on the job.) I realize that the position might not be exactly as it was in the job description, and I hope to find out more at the interview about what exactly I'd be doing on a daily basis.
Question: The HR rep told me the names of the interviewers, and I'm acquainted with one of them. However, I'm meeting with him last. Is it considered inappropriate to call my acquaintance in advance, to find out what skills they're looking for most? (That way I can prepare better for my meetings with the first few interviewers?)