Qualcomm interview questions

I had applied to Qualcomm on their website in January and got a call for a phone interview only in March. I had 2 phone interviews one after the other with 2 managers in the department.The people were very friendly and laid back. The interview was fully focussed on my resume and getting to know me better. We had a great conversation about the company, about the U.S, about my university. I was tested on all the projects I had mentioned in my resume in detail.

Initially had a phone interview, which consisted basic questions on algorithms, C/C++, some puzzles. After a week 1:1 interview consisted of 4 technical and 1 with hiring manager. The technical consisted of the same stuff of above average level. Qualcomm asks a lot on bit manipulation in C. The interviews went well but did not receive any offer, reason given was hiring freeze.