Qualcomm

The process included a written test followed by two technical rounds and one interview. The written test was easy, featuring basic questions and aptitude, and lasted approximately one hour. Each interview was about one hour long. The whole process

First round is Written Test and the second round was Face to Face with Tech Team. Be prepared with Java concepts and the questions were based on the position requirement & what you have mentioned in your resume.

Mostly focusing on C, OS, and Data Structures (DS), especially arrays. That's not more than that. System knowledge is essential. Knowing the kernel helps. Check any Qualcomm interview questions; they tend to repeat the same topics.