I've given 3 - 4 interviews recently so I can answer this. After some casual discussion, you will be asked to share a screen with the interviewer and you will need to do live coding. So the interviewer can get to know how you approach the solution to the problems.
I failed 2 skype interviews before. After that, I started practicing technical interview questions. I solved around 100 + problems and it helped me to finally do live coding in front of my interviewer and I succeeded.
I strongly recommend you to start solving competitive problems. It will help you to gain a lot of knowledge and confidence.
Hope it helps