HintMD interview questions

I have contacted by third party recruiter and set up call with Hiring Manager.Hiring Manager ask about my current project and role and also asked Spring Framework fundamental question.In next steps is 45 min coding interview with UI Engineer and Backend Engineer. Both engineer ask about my current project and role and explain me about company and products.In addition to that asked 4 technical question. In remaining 15 minutes ask to solve medium level Dynamic Programming problem. I felt it is not reasonable. Backend Engineer try to give hint but was not able to communicate clearly. I was able to solve the same question later in 30 min.