Which of the following is NOT a life-cycle methods of an Activity that can be implemented to perform various operations during the lifetime of an Activity?

Which are correct with regards to signing applications? a) All applications must be signed. b) No certificate authority is needed. c) When releasing application special debug key that is created by the Android SDK build tools can be used.

What's the output? SensorManager mgr = (SensorManager) getSystemService(SENSOR_SERVICE); List sensors = mgr.getSensorList(Sensor.TYPE_ALL); for (Sensor sensor : sensors) { System.out.println(''''+sensor.getName()); }

What's the output try {String token = GoogleAuthUtil.getToken(this, email, 'https://www.googleapis.com/auth/devstorage.read_only'); System.out.println(token); } catch (IOException e) { System.out.println('IOException'); } catch (UserRecoverableAuthException e) { System.out.println('UserRecoverableAuthException'); } catch (GoogleAuthException e) { System.out.println('GoogleAuthException'); }

Using a content provider, which operations are able to perform? a) create b) read c) update d) delete

Which widgets help to embed images in activities?

What is a Master Detail pattern?

When does ANR occur?

What is the purpose of the AppCompat library?

The default action resultant when pressing the device back button is to pop the backstack. What is the backstack?

Which is considered best practice according to Google’s Android Development documentation?