I've gone through HR screening (very simple questions about my current situation, visa status, how do you manage your time, how do you overcome a difficulty...).

I also completed a HackerRank coding challenge (Math, and I chose Matlab and Java).

Now I'm waiting for the technical phone interview.

Java coding:

• Implementing an interface.
• Another easy coding problem dealing with strings (like reversing characters in a string).

Math:

You need more logical thinking than technical math knowledge. An example question was: It takes respectively 4, 7, and 13 days (don't remember the exact numbers) for Matt, Alicia, and John to build a car. If they all work together and build a car that costs $15,000, how much money can be attributed to Alicia's work?