What is an android Activity,AppCompatActivity and Fragment Activity. Interview Question

• An Activity is an user accessible screen.
• An activity class loads the all UI widget/component through XML file
• Every activity must be declared in androidmanifest.xml file which is in your project
• Activity is a baseline class. Its derived from "android.view.ContextThemeWrapper"
• AppComptActivity - Its used for defined the material design widget in UI. We are using AppCompatActivity instead of the ActionBarActivity (ActionBarActivity is Deprecated). AppCompatActivity derived from "androidx.fragment.app.FragmentActivity".
• FragmentActivity - Its used to define the Nested fragment in our activity class. Its inherit from "androidx.activity.ComponentActivity" and ComponentActivity is derived from our Baseline Activity class
• Dependency for AppCompatActivity:

 implementation 'androidx.appcompat:appcompat:1.1.0'