Edutech Senior Software Engineer interview questions

Interview timing: 4PM I reached the office at 3:50PM Guard said the Contact person is not in the office, we can't allow you to go inside. Called the Contact person, he said he'll be there by 4 PM. Waited outside the office till 4PM. Contact person came at 4:15 PM(I was waiting outside the office) Guard allowed me to go inside(Phones not allowed inside the campus) Contact person asked me to wait for 5 minutes at the reception. I waited till 4:50 PM and no one showed up. I stood from the seat. Handed the visitor card to the guard, picked my phone and came back. NICE EXPERIENCE LEARNT A GOOD NUMBER OF THINGS FROM THE INTERVIEW :\