What is the best answer to the HR question, "you are from an ECE background, so why you want to join an IT company"?

you could highlight your understanding of hardware and software systems, problem-solving abilities, and familiarity with technology.

The best answer to this HR question would be to emphasize the transferable skills and knowledge gained from an ECE (Electrical and Computer Engineering) background that are relevant to the IT industry. For example, you could highlight your understanding of hardware and software systems, problem-solving abilities, and familiarity with technology. Additionally, you could express your enthusiasm for learning and adapting to new technologies and how you see the opportunity to contribute to the IT company's goals and growth. This demonstrates your ability to leverage your existing skills and knowledge to succeed in a new industry.