Yes (PIN or password unlock). It also has a slide, face, and pattern unlock.
If you mean passcode (safety lock, asks for code on wake up):go to Settings on the Home Screen> General> Passcode Lock> (enter your passcode)> Turn Passcode Off> (enter your passcode again)
Go into settings, then general, then passcode lock, enter your passcode then click change passcode
Open "Settings"Go to "General"Click on "Passcode Lock"Click on "Turn Off Passcode"Enter your Current Passcode and confirm if necessaryThe Passcode will now be turned off on the iPad!
Not individual games no, but you can passcode lock certain game ratings through parental settings or you can just put a passcode on certain accounts through account settings
Go to settings>general>passcode lock Enter the passcode you already have set. Click change passcode and enter your old passcode. Carefully choose a new passcode and enter it. Then enter it again. To erase the passcode, click turn passcode off, and enter your old passcode.
settings/general/pass lock... once you get to the pass lock section enter your current passcode(if you have one), once in you can simply turn on or off the Simple Passcode option. if this option is on you only have a 4 digits passcode, when turned off you can make your super passcode with letters
you need to know the actual passcode... settings/general/passcode lock
Follow these steps: Settings app > General > Passcode Lock > Enter passcode > Turn Passcode Off > Enter passcode once more
go under settings -- general --- passcode lock
You go to Extras> Scroll down and press Screen Lock>
Go to "Settings" then go to "General" and scroll down until you see "Passcode Lock" tap this and once entering your passcode you will have the option to disable the passcode.
Since the question doesn't specify what Nexus the person is comparing it to the Nexus S, here's the order of Nexus phones (and by manufacturer) to date: -HTC Nexus One -Samsung Nexus S -Samsung Galaxy Nexus -LG Nexus 4 -LG Nexus 5