GlobalLogic Senior Software Developer interview questions

I had 4 rounds. Technical-1 (cleared) Technical-2 (cleared) Manager Round (cleared) HR (cleared) HR told me that, they are going to release the offer in 2days. After 2 days, I called them but they haven't answered call. I have sent an email to them but haven't responded to the email.

I got a call from an employee referral. The interview process has mainly 3 rounds Two Technical rounds, one Managerial Round, and one HR round. Below Coding, Questions asked in the Technical round. Sum two LinkedList. sot 0,1,2 in array.