WD Principal Engineer interview questions

Being referred by a friend who works there, I was still shocked by the phone call from a HR specialist the next evening. It is very efficient for them to contact the candidate. Several questions were asked about my CV and then she asked when I can make an onsite interview. It's a pity that I have an one-month-long international travel in 3 days after the phone call. So I did not make it for the onsite interview.