Red Hat Software Engineer(Developer) interview questions

I remember I got at at least 1 phone screen and 3 or 4 onsite interviews. All of the technical interviews are about OS details since I applied for a Linux kernel job.

Was contacted by a recruiter to fill out a questionnaire. Recruiter told me that I was a great fit, but requested compensation didn't match the range for the position. So I said that I was willing to be flexible, and then the recruiter told me that they would get back to me soon. After some time I called the recruiter, who then proceeded to put me on hold. After about 20 minutes of being on hold, I was disconnected and not called back. After 2 more days I emailed the recruiter, who replied and let me know that they would talk to the hiring manager and get back to me within a day. 3 business days passed with no response from the recruiter. I then called the recruiter who told me that the hiring manager wasn't interested because of my requested salary range (despite expressing desire to be flexible). So all in all 2-3 weeks of back and forth with a recruiter, and not one conversation with a hiring manager. It is clear that Red Hat is interested in hiring cheap, rather than highly qualified individuals. If you are even marginally skilled, I would avoid applying here. The recruiter I spoke to was nice, and despite hanging up on me, and not being proactive about responding.