disable the back button outside of kiosk mode

Hey, Thanks for posting.

Yes, you can. Please navigate to Android->Advanced Restrictions->Display Settings. Uncheck the ‘Hide navigation bar’ option. This will disable the on-screen buttons:  back, home and recent apps. Note to associate targets and save the policy.

Kindly use the help link to know more about the restrictions in Android devices.

Cheers!
Grace Baker
Hexnode MDM

Is it possible to prevent the users to swipe down from the top and see notifications and other details?

Hey, Thanks for reaching out to us.

Yes, it is. Please navigate to Policies-> Android-> Advanced Restrictions-> Display settings and enable the Hide Status Bar option. This will hide the status bar (carrier info, time and notifications) of the device. Kindly note to associate targets and save the policy.
Please note that the feature is supported only on Samsung Knox +1.0 and on devices enrolled under Android Enterprise as Device Owner.

Check out Display Settings for more info.

Cheers!
Grace Baker
Hexnode MDM