You can find a lot of valuable practice problems for software engineering interviews online. I recommend the website Codebasil - Practice Coding Interviews, which groups problems into sets for you to master concepts with simple to understand and throughly written solutions.

These solutions walk you through the data structures and algorithms necessary to solve the problems as well as the type of problem solving thinking involved to arrive at the answer, which is a crucial component of a job interview. There are Warm-up questions to master and then Standard questions to really try your hand at the problems! Additionally, these coding questions were written by engineers who have worked for companies like Google, Facebook, Apple, and Amazon!

Happy practicing and best of luck for your interviews!