title: Virtual Pointer
body: <p>What is virtual pointer?
  Hi, ALL,
  Today I had an telephone interview and got a question: "What is virtual pointer?"
  I stumbled on this one, so after it was finished, I tried Google. Unfortunately, it gave me a virtual table references only.</p>
  
  <p>So what is virtual pointer in plain English? How do you define it?</p>
  
  <p>Thank you.</p>