I had a recent telephonic interview with Google. It was a medium-high LC Graph question, wherein I solved the code properly within time. I ran the code with possible test cases and mentioned the edge cases for the same and was also able to answer the follow up question which was to optimize my solution.
I thought I had aced the interview since it was a great discussion that I had while solving the problem, but I am now asked by my Recruiter to have a second telephonic interview.

Can anyone suggest, if it is a good or a bad thing to get the second interview, and also how does it affect on the chances of getting to the onsite interviews.
Additionally, are there any suggestions to look for while preparing for the second telephonic interview to get a "CLEAR PASS" for the onsite interviews.