If you're talking about updating the Nexus 7's OS, look under Settings, then scroll down until you see About Tablet. In there, go to System Updates. It will then either tell you that there is an update available, or when it was last updated (if at all). If you don't see an update, you can tap Check Now. Google rolls out OS updates much faster than a carrier-branded tablet, so expect newer flavors of Android when they come out to get to you sooner.
Regardless if you have the 2012 Nexus 7 or 2013 Nexus 7, you will have approximately 12 GB of usable space after a factory reset.
There are various types of Nexus devices, but the Nexus 7 is part of that same family.
The 2012 Nexus 7 came out on July 2012. The 2013 Nexus 7 came out on July 2013.
I don't understand the context of your question, so I'll give you a few scenarios. If you are reactivating a Nexus 7 from sleep, just press the power button and a lock screen will appear. Assuming it wasn't encrypted, sliding the lock icon to your right will unlock it. If for some reason your Nexus 7 froze, you can long press the power button and it will turn off. Pressing the power button again will turn it on. If you have obtained a used Nexus 7 and wanted to reactivate it, you can go into Settings > Backup & reset, and do a Factory data reset. Remember by doing this, it will erase everything stored in the device. Once this is done, you would then setup the Nexus 7 from scratch.
Yes, the Nexus 7 (2013) is Bluetooth Smart Ready certified. The 2012 Nexus 7 supports traditional Bluetooth.
The 2012 Nexus 7 debuted on July 2012. The 2013 Nexus 7 debuted on July 2013 (August 2013 in Canada).
The Nexus 7 is an Android Tablet made by Google. It has a screen size of 7 inches.
In the 2012 Nexus 7, it came with a single camera (in the front). The 2013 Nexus 7 has two cameras, one in the front and one in the back.
The Nexus 7 is the better tablet.
Nexus 7 tablet 2013 Has a front and rear Camera.
Yes, the Nexus 7 comes in LTE versions.
The 2012 Nexus 7 had a soft leather back. The 2013 Nexus 7 went for a harder shell with a soft touch-coated plate.