GrowthPlug Python/Django Developer interview questions

The interview was in the range of average and difficult. At first I had an interview with the technical Lead then they gave me a task to complete using django rest framework.I completed the task by my self. 2 weeks later I got a call and they scheduled my next level of technical round interview.I passed the interview and there was a final round of interview with the CEO,the company scheduled the interview 3 times but the CEO did not joined due to busy. Then after that I enquired about that, at that time the hr told me to attend another interview(walk-indrive) I attended and cleared the first round. But they got me rejected on the next level.