BairesDev Java Tech Lead interview questions

What was your most challenger project in your career and why?

I'm writing it to share my experience with Bairesdev recruitment. Last year April/May I applied on Linkedin for a Java position. Instantly, I was invited for online tests. After finishing there was introductory interview with recruiter. Then they arranged a technical interview. After this interview there was communication from Bairesdev time to time asking me if I was still available or not, they may call me anytime. In the meantime, recruiter changed, I was introduced to new recruiter. As it was already quite long time, I inquired about it in February. I received instant reply from a new recruiter, he said I was in queue getting a call soon. Then the pandemic started and I thought this process may get late. However, I again contacted on September and that same guy from last communication told me that I have to apply for Bairesdev job again. So then I looked for some suitable openings from Bairesdev on Linkedin and sent mail to their jobs mail and received invite for same tests that I went through last year. I explained in reply that I already completed this process last year and was waiting to be hired. If they want to further check my skills, they can give me some assignments/tasks, what's the point going the same process again. The guy repeated the same thing in reply that I have to go through those same tests. Finally, I decided to quit. The whole story is now almost one and half year long. So, I would request people to be cautious, it may turn out to be waste of valuable time. Thanks