Knak Software Developer interview questions

The interview process consisted of HR, the Hiring Manager, and a Technical Interview. Everything up to a technical part was fair, while they were prolonging the interview lingering it more than they should. I was not told what to prepare and which IDE to have installed. Was asked questions being expected to know someone else's code by seeing it first-time. The only pressure was from not knowing what to expect, they were causal, but expected a lot.