Enable debugging on your device: If you are using the emulator, this is enabled by default. But for a connected device, you need to

What public methods are there in android.widget.Toast.Callback? (Choose two.)

As an example. In an Activity we have our TimerViewModel object (extended ViewModel), named mTimerViewModel. mTimerViewModel.getTimer() method returns a LiveData<Long> value. What can be a correct way to set an observer to change UI in case if data was changed?

Select 3 major components of the Room. (Choose three.)

What method should we use with Notification.Builder to supply a PendingIntent to be sent when the notification is clicked?