Expedia Group interview questions

A headhunter got me the interview and managed the relationship with the company. The process was a typical day-long affair with several interviewers, whiteboarding, and a discussion with a hiring manager. Overall, very standard process for the area.

I talked with the HR and then talk with the hiring manager. Wrote an email to hiring manager for updates, never heard back. One question is what do you think would be your challenging in doing this job.