Cisco Software Developer Engineer interview questions

I was asked a technical question on Machine Learning during the recruiting at a Career Fair straight away while reviewing my Resume. The question was on the possibility of separating houses for a Realtor into various clusters. I answered the question by proposing a Decision Tree (ID3 Algorithm) or a Linear Separator, depending on the number of features that the test data had. I then was offered a phone interview, where I was a standard question regarding Data Structures and Algorithms. (Can't spit out the details, sorry).