The first step was a phone screen, where I was asked mainly about my resume and background. The interviewer was interested in my undergraduate project, which was about LTE. They also asked two probability puzzles, which were not particularly difficult.

About three weeks later, I received an onsite interview invitation. This consisted of two one-on-one rounds, each lasting one hour. I later worked with one of the managers during my internship.

Went through resume.

Asked about Digital communication, source coding and channel coding procedure, Rake receiver, and convolutional coding concepts.

Very few coding questions were asked. Instead, inquiries focused on static, global, and volatile variables.