Qualcomm Software Engineer interview questions

They emailed me saying they wanted to interview, and would email me in the future with a date and time and location. I basically got about 3 days notice for the interview. When I got there, he told me a little about what the internship would be like, then looked over my resume. He saw that I had Java and C++ listed. I told him immediately I had just a little experience in C++ but since I had used it before I could pick it up really fast, and that's why it was on there, but I had lots of experience with Java. He asked about some of the things that stood out on my resume, but didn't really seem to care and was kind of rude about it actually. Then he asked me technical questions, about C++, even though I told him I was good at Java. I'd figure he'd try to get a feel for what I actually knew instead of what he already knew I didn't. Lots of memory questions and things I told him I had no idea about beforehand. Then I asked him some questions about his work at Qualcomm and what he thought of it etc, to try to get him to warm up to me. But it didn't really work, and the next day I got the email saying I wasn't the right match. Overall it was a pretty awful experience and the interviewer was a jerk who didn't give me a chance at all.

First Round (Telephonic) : Basics of LTE and LTE TDD , RTOS concepts , a question on C programming, Q format conversions. In person Round 1 : RTOS concepts, LTE L1 system architecture, embedded C questions mainly on bit operations,priority inversion, WDT,Paging concepts,Reentrant functions,Hard and Soft real time systems and wireless domain specific questions. The c questions were: 1. To set 'N' bits in a number efficiently , N is a variable. 2. Find the number of SET bits (1s) in a given number. 3. Q format conversion. 4. Bit field structures. 5. How to find whether a DSP is Little endian or big endian? In person Round 2 : Fempto cell systems since I worked on it. In person Round 3: Wireless communication basics and LTE basics , mainly from 3GPP specifications. HR Round : Was a formality and I was told feedback would be given after a week .