I applied through a recruiter.

There were three to four rounds of technical discussions. They were mostly on the overall experience, your work, and a few basic design questions. No coding questions were asked as such. The interviewer asked questions like "What was your most challenging work?", "How did you achieve it?", and "What was your contribution in it?"

You need to design a system to create a CMS to allow multiple components to be modified, added, or deleted using a scalable approach?

What was your most challenging project and why?