I was expecting a RQ, so it did not come as a surprise. I landed in Canada late 2007 while I was a student in an undergrad program at a university outside Canada. It was a 4 year program that I had already started and I decided to finish the program before I moved to Canada. I moved to Canada the very next day after I finished my final examinations( in 2011 ). Even though I made a few visits to Canada for vacation during this period, I was not able complete the 730 days required to keep my PR card alive. I could only apply for my PR renewal after I completed the 730 days and I surprisingly got it renewed without much trouble.
I have made Canada my home since that day, travelling abroad only once in December 2013. I knew that they were going to ask me questions when I applied for citizenship.