I took an online C test. There were 20 questions with 3 minutes for each. It was tricky and involved a lot of questions about "What does [some-C-function] do?", "what is the result of [some code]?", "where is the error in [some long piece of code]", "how to do [some function] in a single line?". There were questions about the comma operator, xor, as well as some questions about the STL.

I had an online C test. It was very difficult. Lots of tricky questions. Then next week we had a phone interview. They asked me about my skills and my previous experiences. They asked me to attend a face to face interview with them. I didn't attend to face to face interview