With smaller companies, you may encounter more domain specific questions when it comes to coding interviews. What does this mean? It means that the questions focus less on computer science fundamentals like Data Structures and Algorithms, and instead they focus on the technology stack that the company is actively working with. To practice these questions, I have listed a great list for you to go through based on what type of job you are applying to (React developer, Mobile developer, etc…):

https://github.com/MaximAbramchuck/awesome-interview-questions

Also:

Front End Developer: https://github.com/h5bp/Front-end-Developer-Interview-Questions

Javascript Interview Questions: 1, 2, 3

PS, keep in mind that it will be hard to just get everything right from the beginning. With enough practice you will become better and better, but there is an entire community of us learning, so I recommend you tackle these questions together with our online Discord community (see lesson #3 in this course for the link) and join the conversation and tackle problems in the #interview-questions channel.