Preguntas de entrevista para VacuumLabs

Multiple stage interview where the first stage is a coding interview with time limit for about 2 hours. After completing it I got a congrats from the recuiter and then it ghosted me. I came back after 2 weeks to ask him what happened with the process and he told me that the CTO froze all hiring. HR is very unprofessional and does not keep you up to date with the process. I regret spending 2 hours on the coding challenge now.