upwork test asp.net: Android

Multiple Answers

1. To run your app on real device which is required

---- enable USB debugging on android device

---- install USB driver for window

---- plug android device into your system

2. One can declare a logical parent “.MainActivity” to <activity> by adding the following line in the respective <activity> in AndroidManifest.xml.

---- android: parentactivityname=”.MainActivity”

3. Button and textviews both inherits from the same android class name:

---- android.view.View

4. Which of the following lifecycle methods are common to both activity and fragment?

---- onStart()

5. The best practice is to put Strings value in ____ file.

---- strings.xml

6. What is the difference between broadcast receiver and Intent filter?

---- A Broadcast receiver allows an app to register to be notified upon system or application events; an intent filter specifies which intent an app can receive.

7. What is Retrofit?

---- A type safe client for consuming restful API’s in android and java in general.

8. The ‘showAsAction’ attribute of <item> in menu resource file can have which of the following:

---- ‘ifRoom’

---- ‘withText’

---- ‘never’

9. _____ are like reusable components or subactivities and can be reused between sub activities.

---- Fragments

10. What must be done after a TypedArray is no longer needed?

---- The Recycle() must be manually called in order to notify the system that the object is no longer using memory allocated to it.

11. What is Master Detail Pattern?

---- A Layout pattern consisting of a master layout (containing a collection of data) and detail (containing detailed information about an item from the collection)

12. What is the purpose of a Loader?

---- Loaders are special-case data streams that provide a bytewise iterator when accessing files from external storage.

13. Which superclass do most UI elements extend?

---- Activity

14. Which of the following is true?

---- Activities are top-level classes that can contain and manage Fragments.

15. The Strings.xml has ________ element

---- <resources>

16. When publishing updates to an app on the Google Play Store, which of the following is true?

---- The keystore used to sign the APK to publish the app must match previous published versions.

---- The package name must be the same.

---- The versionCode must be incremented or higher than the previous published version.

17. The addCategory() method places a category in an Intent object, ____ deletes a category previously added, and ____ gets the set of all categories currently in the object?

---- removeCategory()

---- getCategories()

18. When defining a View within an XML layout, which two attributes are always required?

---- Width and Height

19. Which feature of the Java build process allows for Android projects with more than 65k method calls?

---- Multidexing

20. To pass extra information with intent we can use which intent method?

---- putextra()

21. What are the Android Support Libraries for?

---- They allow features introduced in more recent versions of Android to be used on devices running older OS versions.

22. What does the following code do?

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»);
}

---- prints token

23. What is the purpose of the AppCompat library?

---- It allows the app to share content with other apps via the share intent.

24. Which of the following is correct about Intent Filter?

---- Intent filters are defined inside AndroidManifest.xml

---- An Intent Filter also specifies a category

25. Which statement converts the object into String?

---- none of the above

26. What is Guava?

---- An open-source project consisting of common libraries for Java, maintained and primarily developed by Google.

27. Which of the following is true for R.java?

---- R.java file is special Java file that’s get generated by the android tools whenever you create or build your tools.

---- Android uses R.java to keep track of the resources used within app.

---- It contain string resources.

28. Which method sets the layout for the activity?

---- setContentView()

29. Which file contains information about the app?

---- AndroidManifest.xml

30. Which of the following correctly adds a string array resource to string.xml?

---- <string-array name:=”name”>

<item>string_value1</item>

</string-array>

31. What is the purpose of Volley?

---- Volley is an HTTP library that makes networking for Android apps easier and most importantly, faster.

32. Which of the following are true for Intent?

---- If one activity wants to start a second activity

---- startactivity(intent)

---- Intent is an object.

33. Which of the following is the correct location for the menu resource file?

---- res/menu/filename.xml

34. Which of the following is not an activity lifecycle method?

---- onDetach()

35. When creating main Android App project with Android studio, how can we support localization of the Android App?

---- main/res/values/strings.xml

36. What does the following code do?

Calendar cal = Calendar.getInstance();
DateFormat dateFormat = new SimpleDateFormat(«yyyy-MM-dd»);
cal.add(Calendar.DATE, -1);
return dateFormat.format(cal.getTime());

---- Gets yesterday’s date and returns its formatted string

37. Going to check network connection with below source code. What can be required to make it work?

public boolean isOnline() {
ConnectivityManager cm = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) return true;
return false;

}

---- android.permission.ACCESS_NETWORK_STATE

Sunday, May 5, 2019

Android