Lob Technical Phone Interview

Hi, Today I got an email for the second round for the Software Engineering Co-op position at Lob. The email says that this will be an hour-long "phone" call with a shared editor. If anyone has been through this round at Lob, could you please advise me on what to expect and how to prepare? (I haven't scheduled the call yet, and I am willing to give 4-5 days of serious preparation for this round). Little background about me: MS in Computer Science student @ USC Internship at Amazon from May - August 2019 1 year of past experience at Juniper Networks Thank you!