title: Will a 64 bit JVM run in 64 bit mode when no option like -d32 or -d64 is specified
body: <p>I have installed a 64 bit Java on a 64 bit Centos machine. My query is that if I dont specify the -d64 option will the JVM run in 32 bit mode even if there is no 32 bit JVM installed ? </p>
  
  <p>Also I was a bit curious if we can use the -d64 option with "javac". If yes, then what does it imply or where could it be used? I came across this when reading <a href="http://www.oracle.com/technetwork/java/hotspotfaq-138619.html" rel="noreferrer">this article</a>.</p>
  
  <p>Thanks</p>