When asked these questions, the panel tries to find how resourceful you can be when required. They want to gauge how you face challenging situations and whether you are professional enough and try to solve them.  You can build a scenario like, "I was a junior xx in my previous organization, and from that, I was promoted to senior xx even though I did not have the proper training. With little help and guidance from my colleagues and seniors, I was compelled to figure things out independently. This process helped me to take up responsibilities that were sometimes even beyond my job description. When given a task I lack the necessary knowledge about, and I try to gain as much knowledge as possible and put my best foot forward to accomplish it."