The first round was a general online assessment.

Before the online test, our college had sent a shortlist of students who could register for the said job title on the Amazon Jobs site. Only those shortlisted students received the OA link.

The OA was conducted on HackerRank and had a test window from 9:00 AM to 6:00 PM. The test was basic, consisting of two DSA-based questions. The questions were shuffled for students in different combinations.

Approximately 4000 students took the test, and 440 students were shortlisted for the Interview Round.

Iterate over the two linked lists and add leading zeros in case one list has fewer digits than the other.

Start at the top node of both lists and call the recursive function on the next node. Continue to the end of the list.

Create a node for the sum of the current number of digits and return the carry.