How will you prepare your test scenarios in case there is no documentation available and the team which could help you out is extremely busy and which principal of testing should be referred to in this scenario?

Look out for domain of the project being developed, study about it,
discuss it with your friends and try to get an idea if anyone has worked on the  domain and ask them to share their understanding. Also, this scenario refers to ‘’Early  Testing’ principal out of seven testing principles.