BENU interview questions

Went to the in face interview with HR girl and two of my would be superiors. Gave me a task to prepare a testing of a system. That is it, just when the testing must be finished but absolutely no details what so ever. So I tried my best including A/B testing. I wrote some stuff on the board. Then they finally told me its actually a command line application which is so ancient and I never even encountered in my career. They made jokes about me. Overall, the worst interview I ever had.