EXAM

Question 1

What permission is needed to perform network operations?

Answer 1

android.permission.INTERNET

Question 2

What are the 2 main advantages of the ViewModel class?

Answer 2

1. Persist UI state
2. Place for business logic

Question 3

The lifecycle of a ViewModel is directly tied to its _______.

Answer 3

Scope

Question 4

What method does the ViewModel call when it is destroyed?

Answer 4

onCleared()

Question 5

LiveData is an _______ data holder class.

Answer 5

observable

Question 6

LiveData is _______-aware, meaning it respects the ______ of things like activities, fragments, etc.

Answer 6

lifecycle

Question 7

What is the data type we use for LiveData?

Answer 7

MutableLiveData< Data Type >

Question 8

Which lifecycle method is the best place to begin observing LiveData?

Answer 8

onCreate()

Question 9

How do you create an observer?

Answer 9

val observer= Observer< Data Type > { new -> view = new }
viewModel.current.observe(this, observer)

Question 10

What permissions are needed for MyLocation functionality?

Answer 10

1. ACCESS_COARSE_LOCATION
2. ACCESS_FINE_LOCATION`