Archcorp Architectural Engineering interview questions

Interview process has different phases 1)Round 1 was Technical Interview Round: 2)Round 2 was home system design interview round Round1 : Was asking about my current experince what projects i have done so far and what are my intents as to contribute to archcorp with python and sql theory and hands on test. Round2 : Was about i have to design the system design for the application they mentioned me and i have to provide the whole workflow diagram and how the flow will look like

after confirming the interview and changing the time many times by them they canceled the interview saying they will call me after putting me in shortlist (already I was shortlisted)