ORBCOMM Senior Software Engineer interview questions

Hr has been called so many times for interview for walk in for specified date. went there by traveling 70 km,Taken two rounds 2hrs and cleared two rounds among 7 members. Going home with happy for ORBCOMM director round, suddenly got call from hr, they want to take one more round, I said Yes, they scheduled, after 10 min they cancelled, they saying panels is in leaves, will come in touch in Wednesday, today they Saying position filled. I hope you can take decision while joining this company that's upto you, before joining this surprise and after joining how many surprises.

Started with a phone screen, which then moved on to a technical interview. The majority of questions were related to my technical background and what I have built. The technical interview had some small technical questions and a whiteboard question, which involved designing a software solution for IoT device communications