This question consists of two separate components, so let's analyze it. First, the interviewer is inquiring about your adaptability and problem-solving abilities. They want to evaluate how well you can adjust to a new technology or tool that you haven't previously encountered. Are you open to change? Do you learn quickly? Do you approach challenges systematically? Secondly, they are interested in your ability to self-assess. They aim to gain insight into how you evaluate your own learning journey and assess whether you have comprehended and mastered a new tool or technology. To address the first part of the question, you should share your experiences with learning a new technology and outline the steps you took to become proficient. You could detail your research methods, any training or tutorial sessions you participated in, the practical application involved, and your determination to achieve mastery. For the second part, you can explain how you gauge your own progress and comprehension. You might mention setting learning objectives, applying the technology in real-life scenarios, soliciting feedback from others, or even demonstrating or teaching the tool to someone else as a way to confirm your understanding.