Nielsen Researcher interview questions

Recruitment process consisted of an interview with the HR person, an interview with a hiring manager, a take-home analytical task, a ptt presentation to be done and a final interview with a panel. Everything was going fine. The HR would get back to me immediately after each step completed to ask about my feedback. After the final interview, I was assured they'd get back to me with a decision within a few days. Except they never did. Choosing one candidate over another is perfectly fine. Ghosting candidates who invest time and effort into a demanding recruitment process is a very bad practice and lack of work ethics.