In Android 4.2.2 Multiuser profile the apps are installed for each user or they just create the new instance? -

i trying understand android 4.2.2, apps installed each user or these apps creating new instances new profile users.

whenever create new profile user in jellybean supported tablet apps there gmail, youtube, maps etc. means? installed once again or create instance owner installed apps.

the actual apk file installed once, , common users.

however, each user profile reports separate physical location on storage disks app's internal , external memory, app's data unique each user.

this way, each user gets complete installation of app, without requiring multiple copies exist.