Qualcomm SWE Intern interview questions

There was only a single round of interviews. The interviewer was friendly and casual. After introductions, I was asked some questions from Operating Systems and Object Oriented Programming. Later, I was asked to write code for a simple problem, that is to rotate a matrix by 90 degrees.

On Campus, 1st Round was general Aptitude and Data interpretation. 2nd Round was Technical Interview. 3rd Round was again Technical Interview but I was out of the process in 1st technical round.