5. In VirtualBox Import the file. Go to File > Import Appliance.
6. Select the Oracle_Developer_Day.ova file that was downloaded and click on Continue.
...
7. Select "Reinitialize the MAC address of all the network cards".
8. Ensure the path to the Virtual Disk Images are correct.
...
12. Rename the VM. Click on settings and change the name to dbv01 and version to Oracle (64 bit).
13. Click on Advanced and make sure the Snapshot Folder is correct.
14. Click on Network. Set Adapter 1 to NAT Network and select the NATNetwork as the Name.
15. Click on System and change the memory to 2380MB and unclick CD/DVD.
16. Click on Ports and then USB. Disable the USB controller. The VM may not be able to start if USB support is turned on.
17. Click on OK.
17. Click on Start to start the VM.
...