Virtual Machines

• What is a virtual machine?

  A virtual machine is a program that has the same functionality as a physical computer.
• How do emulators function in relation to virtual machines?

  Emulators trick a program into thinking it is running on its native hardware while it is actually running on a different machine.
• Can arcade games from the 1980s be played on today's hardware? How?

  Yes, they can be emulated on today's hardware.
• What is the significance of the code being executed exactly as it was originally in emulation?

  This means that the programs themselves are completely unaware they are being emulated.
• How can emulation be used in game development?

  Emulation allows developers to create a game on a PC and test it on other devices like consoles or smartphones before release.
• What are the advantages of using virtual servers over physical servers?

  • Supports a large number of virtual servers on fewer physical servers
  • Allows for load balancing across physical devices
  • If one server fails, others can take over without user awareness
• What happens when demand on the network increases in a virtual server environment?

  Additional servers can be spun up and the load balanced across different physical devices.
• What is the role of the Java Virtual Machine (JVM)?

  The JVM translates intermediate code into specific machine code for the target device.
• What is intermediate code in the context of Java programming?

  Intermediate code is a kind of halfway house known as bytecode.
• Why is Java considered highly portable between different devices?

  Because it compiles its code into intermediate code that can be translated by the JVM on any device.