For general programming questions I found https://www.interviewbit.com/ https://www.interviewbit.com/ very good. It is both a tutorial and programming questions

For general programming questions I found https://www.interviewbit.com/ https://www.interviewbit.com/ very good. It is both a tutorial and programming questions at the same time. I was asked to describe the important properties of a hash map in a telephone interview. The interview contained less technical questions but various developers asked me about all areas of my CV. There was also a HTML/CSS/JS coding exercise to create a small application to a spec that they gave. So expect to get questions on anything that you've put in your CV. If you're not familiar enough with it - take it out of your CV.