RBC Software Developer interview questions

Applied online through their website. Got an email from a recruiter scheduling a phone interview. Phone interview was mostly around my previous experiences. I was given an assignment to complete before the in person interview. The assignment wasn't difficult but during the demo to the interviewers they asked if I had implemented unit tests for the front end, which was something that was not mentioned on the assignment. I explained that I had done it for the back end only. The feedback I got later from the recruiter was that they found that my assignment was lacking unit tests for the front end.