The Irish twins gave wacky renditions of Ghostbusters,We Will Rock You and Oops, I Did It Again on The X Factor before being voted offthe talent show.
VisualVM is a tool that provides a visual interface for viewing detailed information about Java applications while they are running on a Java Virtual Machine (JVM).
A virtual machine (VM) is an operating system OS or application environment that is installed on software which imitates dedicated hardware. The end user has the same experience on a virtual machine as they would have on dedicated hardware.