Speed performance is the key of any successful application – use the following charts for understanding the big O nation and for upcoming FAANG interviews
Also do not hesitate to prepare your interviews with this book
Cracking the Coding Interview: 189 Programming Questions
Cracking the Coding Interview, 6th Edition is here to help you through this process, teaching you what you need to know and enabling you to perform at your very best. I’ve coached and interviewed hundreds of software engineers. The result is this book.