Android OS: Architecture, Framework and Application Development MCQs

Question 1

Returning to a stopped activity calls:

Accepted Answer

onRestart(), onStart(), onResume()

Answer

onDestroy(), onCreate()

Answer

onCreate() only

Answer

onPause(), onStop()

Question 2

Which value must increase with every update published to Google Play?

Accepted Answer

versionCode

Answer

applicationId

Answer

versionName

Answer

minSdk

Question 3

Google acquired Android Inc. in:

Accepted Answer

2005

Answer

2003

Answer

2008

Answer

2010

Question 4

The Android NDK allows developers to:

Accepted Answer

Write parts of an app in C/C++

Answer

Design layouts visually

Answer

Publish apps

Answer

Test UI automatically

Question 5

Device drivers for display, camera, Wi-Fi and audio are part of the:

Accepted Answer

Linux kernel

Answer

View System

Answer

Resource Manager

Answer

Application layer

Question 6

Runtime permissions (asking the user while the app runs) were introduced in Android:

Accepted Answer

6.0 Marshmallow

Answer

5.0 Lollipop

Answer

9 Pie

Answer

4.4 KitKat

Question 7

MVVM stands for:

Accepted Answer

Model–View–ViewModel

Answer

Main View View Manager

Answer

Multi View Variable Mode

Answer

Mobile Virtual Version Model

Question 8

Binder in the Linux kernel is used for:

Accepted Answer

Inter-process communication between apps and system services

Answer

Drawing graphics

Answer

Compiling Kotlin

Answer

Storing images

Question 9

The bottom layer of the Android architecture is the:

Accepted Answer

Linux kernel

Answer

HAL

Answer

Application framework

Answer

ART

Question 10

When an activity becomes interactive (in the foreground), which callback has just run?

Accepted Answer

onResume()

Answer

onStart()

Answer

onPause()

Answer

onStop()

Question 11

The Low Memory Killer is a kernel feature that:

Accepted Answer

Ends background processes when RAM runs low

Answer

Deletes old photos

Answer

Removes unused apps from the store

Answer

Compresses APKs

Question 12

Where must every activity of an app be declared?

Accepted Answer

AndroidManifest.xml

Answer

build.gradle

Answer

MainActivity

Answer

strings.xml

Question 13

Android 16 corresponds to API level:

Accepted Answer

36

Answer

40

Answer

34

Answer

30

Question 14

Notification channels became mandatory in Android:

Accepted Answer

8.0 Oreo

Answer

13

Answer

6.0

Answer

11

Question 15

ART improves performance mainly by using:

Accepted Answer

Ahead-of-time compilation at install time (plus JIT/profile-guided compilation)

Answer

Larger APKs

Answer

Interpreting XML

Answer

More RAM per app only

Question 16

The layer that provides standard interfaces so the framework can use vendor hardware is the:

Accepted Answer

Hardware Abstraction Layer (HAL)

Answer

Application framework

Answer

Native libraries

Answer

Content provider

Question 17

Which callback is called first when an activity is created?

Accepted Answer

onCreate()

Answer

onStart()

Answer

onResume()

Answer

onRestart()

Question 18

Which native library provides a lightweight relational database?

Accepted Answer

SQLite

Answer

OpenGL ES

Answer

WebKit

Answer

FreeType

Question 19

AOSP stands for:

Accepted Answer

Android Open Source Project

Answer

Application Oriented Software Package

Answer

Android Operating System Platform

Answer

Advanced OS Program

Question 20

Sharing contacts data with other apps is done through a:

Accepted Answer

Content Provider

Answer

Notification

Answer

Service

Answer

Fragment

Question 21

Rotating the phone by default:

Accepted Answer

Destroys and recreates the activity

Answer

Only calls onPause()

Answer

Calls onRestart()

Answer

Closes the app

Question 22

The R class is generated by:

Accepted Answer

AAPT2 while compiling resources

Answer

Google Play

Answer

The emulator

Answer

Logcat

Question 23

Which framework part provides UI elements like buttons, lists and text boxes?

Accepted Answer

View System

Answer

Notification Manager

Answer

HAL

Answer

Location Manager

Question 24

Each Android app runs in its own process as a separate Linux user. This is called:

Accepted Answer

Application sandboxing

Answer

Multithreading

Answer

Fragmentation

Answer

Rooting

Question 25

Android apps' bytecode is stored in which format?

Accepted Answer

.dex (Dalvik Executable)

Answer

.exe

Answer

.jar

Answer

.class

Android OS: Architecture, Framework and Application Development MCQs — Computer Science (page 2)

26. Returning to a stopped activity calls:

27. Which value must increase with every update published to Google Play?

28. Google acquired Android Inc. in:

29. The Android NDK allows developers to:

30. Device drivers for display, camera, Wi-Fi and audio are part of the:

31. Runtime permissions (asking the user while the app runs) were introduced in Android:

32. MVVM stands for:

33. Binder in the Linux kernel is used for:

34. The bottom layer of the Android architecture is the:

35. When an activity becomes interactive (in the foreground), which callback has just run?

36. The Low Memory Killer is a kernel feature that:

37. Where must every activity of an app be declared?

38. Android 16 corresponds to API level:

39. Notification channels became mandatory in Android:

40. ART improves performance mainly by using:

41. The layer that provides standard interfaces so the framework can use vendor hardware is the:

42. Which callback is called first when an activity is created?

43. Which native library provides a lightweight relational database?

44. AOSP stands for:

45. Sharing contacts data with other apps is done through a:

46. Rotating the phone by default:

47. The R class is generated by:

48. Which framework part provides UI elements like buttons, lists and text boxes?

49. Each Android app runs in its own process as a separate Linux user. This is called:

50. Android apps' bytecode is stored in which format?

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