The phone interview is just a general overall picture of what is coming for the (a)1:1 interview. At (a) you go thrugh different offices explaining about experience and personality, I guess this is where they find you if you are fit or not. The nature of the work gives the entire interview process a chill-inelastic sense of comfort. It is very easy to determine the company's culture by the interview process. Lastly, you will get a skill-process-oriented-weed-out "practice" exercise. The practice exercise consists of passing values through functions and displaying the output.