Its took 10-15 minute.Invite for an Interview. Ask question not relevant to your according profile.They want only Particular thing related to design.No manner how to treat candidate.How to talk. I told her if you need this particular thing than you have to told me on over the phone. So she said this is interview process. So i said i asking about your requirement not question.Discuss all the requirement on over the phone then invite. Don't waste our time and money.