First round of interview is a online hackersack test. You need to resolve 20 questions in 90 mins. To be honest the questions were not at all straight forward and probably were taken from live scenarios possibly from TAC. It's one of those test where you wouldn't find in any questions booklet or text book. I would recommend only those who have been working specifically on those networking technology for years would be able to answer them but I don't think even an ccie expert would be able to handle all the questions within specified time as each question requires deeper analysis to find the answer.