Was offered a phone interview.

Received an email five minutes before the interview stating they had to cancel. The interview was rescheduled for the following week.

During the interview, I was asked about some projects I had completed, along with questions regarding memory in Java and C, and the difference between scripted and OOP languages.

I was then given a technical question. The interviewer was very impatient and did not cooperate much, unfortunately. This behavior could have been due to a bad phone signal.

Given a binary tree (not necessarily complete), where each node also has a right pointer, how do you set the right pointer of each node to the node on its right? The rightmost node on each level should have its pointer set to null.