PayPal SDE2 interview questions

I was contacted by the recruiter. The first round was hackearth coding round. The questions were medium to hard level. Then I got a mail, all the rounds were supposed to be completed in one day. The 2nd round was coding round, there were 2 questions of DSA. The 3rd round was technical round, there I was asked about my current projects, then a low level system design. For the managerial round it took 4 weeks, the interviews were rescheduled. HRs are pathetic, they dont even pick up the call during the time of the interview. After 4 weeks of follow ups, mails and 4 rechedulings, I finally had the managerial round. Interviewers were nice, but the HR made the whole process frustrating.