PwC Analyst interview questions

The company came to our campus and we had an online test (aptitude+logical+verbal). Out of 400 people 60 were selected for further rounds. The first one was a technical interview, not difficult at all. He asked me questions like what technology excites you the most, what is the most recent major technology development and few things related to my projects. People who cleared this round had an HR round which was pretty normal and good. The members of the company were quite supportive. After these two rounds about 30 people had a telephonic technical interview with one of the company's partner. He was asking questions from c and c++ or whatever mentioned on your resume. The questions were- what do you know about dangling pointer? What is volatile keyword? What is extern?