Question 1

What does the .apk extension stand for?
A)application package
B)application program kit
C)android proprietary kit
D)android package

Accepted Answer

.apk stands for "Android application package".

Question 2

When you distribute your application commercially,you'll want to sign it with your own key.

Accepted Answer

Signing an application with your own key is important for establishing its authenticity and ensuring that any updates to the application are also from a trusted source. This helps in protecting users from malware and maintaining the integrity of the application.

Question 3

How does Google check for malicious software in the Android Market?
A)every new app is scanned by a virus scanner
B)users report malicious software to google
C)google employees verify each new app
D)a seperate company monitors the android market for google

Accepted Answer

B

Question 4

Which of these are not one of the three main components of the APK?
A)dalvik executable
B)resources
C)native libraries
D)webkit

Accepted Answer

The three main components of an Android APK (Android Package) are Dalvik Executable (.dex files for the bytecode), resources (assets and raw files used by the application), and native libraries (compiled code for specific architectures). WebKit is not a component of the APK; it is a browser engine used in Android for rendering web pages but is not packaged within an APK.

Question 5

What is the name of the program that converts Java byte code into Dalvik byte code?
A)android interpretive compiler (aic)
B)dalvik converter
C)dex compiler
D)mobile interpretive compiler (mic)

Accepted Answer

The dex compiler is responsible for converting Java byte code into Dalvik byte code, which is a format optimized for the Android platform.

Question 6

What was the main reason for replacing the Java VM with the Dalvik VM when the project began?
A)there was not enough memory capability
B)java virtual machine was not free
C)java vm was too complicated to configure
D)java vm ran too slow

Accepted Answer

The main reason for replacing the Java VM with the Dalvik VM was that the Java Virtual Machine (JVM) was not free, which posed licensing and cost issues for the Android project.

Question 7

Android Applications must be signed.
A)after they are installed
B)before they are installed
C)never
D)within two weeks of installation

Accepted Answer

Android applications must be signed before they are installed. This is a security measure to ensure the app's integrity and origin.

Question 8

Which of the following are not a component of an APK file?
A)resources
B)all of these are components of the apk
C)native libraries
D)dalvik executable

Accepted Answer

All the options listed (resources, native libraries, and Dalvik executable) are components of an APK file, which is the package file format used by the Android operating system for distribution and installation of mobile apps.

Question 9

The AWT and Swing libraries have been removed from the Android library set.

Accepted Answer

The AWT and Swing libraries are not part of the Android library set, as they are not suitable for use in Android applications. Android applications use the Android UI framework, which is designed specifically for mobile devices.

Question 10

The R.java file is where you edit the resources for your project.

Accepted Answer

The R.java file is automatically generated by the Android build system to provide a reference to resources, such as strings, drawable files, and layouts; it is not meant to be manually edited.

Question 11

What is contained within the manifest xml file?
A)the permissions the app requires
B)the list of strings used in the app
C)the source code
D)all other choices

Accepted Answer

The manifest XML file in Android applications specifies essential information about the app to the Android system, including the permissions the app requires to function properly.

Question 12

What is contained within the Layout xml file?
A)orientations and layouts that specify what the display looks like.
B)the permissions required by the app.
C)the strings used in the app.
D)the code which is compiled to run the app.

Accepted Answer

The Layout XML file in Android development is used to define the visual structure for a user interface, such as the layout of widgets on the screen. It specifies orientations and layouts, determining the appearance of the app's interface.

Question 13

The emulated device for android.
A)runs the same code base as the actual device, all the way down to the machine layer.
B)is more of a simulator, and acts as a virtual machine for the android device.
C)runs the same code base as the actual device, however at a higher level.
D)an imaginary machine built on the hopes and dreams of baby elephants.

Accepted Answer

The answer of The emulated device for android.
A)runs the same...

Question 14

Your Java source code is what is directly run on the Android device.

Accepted Answer

Java source code is compiled into bytecode, which is then converted into Dalvik bytecode (for older Android versions) or into an Android Runtime (ART) format for newer versions, which is what actually runs on the Android device.

Question 15

The Emulator is identical to running a real phone EXCEPT when emulating/simulating what?
A)telephony
B)applications
C)sensors
D)the emulator can emulate/simulate all aspects of a smart phone.

Accepted Answer

The emulator cannot simulate sensors.

Question 16

How is a simulator different from an emulator?
A)emulators are only used to play old snes games, simulators are used for software development
B)the emulator is shipped with the android sdk and third party simulators are not
C)the emulator can virtualize sensors and other hardware features, while the simulator cannot
D)the emulator imitates the machine executing the binary code, rather than simulating the behavior of the code at a higher level.

Accepted Answer

Emulators mimic the hardware and operating system of the target device, allowing binary code to run as if it were on the actual device. Simulators, on the other hand, model the internal state of a device or environment at a higher level, focusing on the behavior rather than replicating hardware.

Question 17

The R file is a(an) generated file
A)automatically
B)manually
C)emulated
D)none of the above

Accepted Answer

The R file is typically generated automatically by the Android build system when resources are compiled.

Question 18

An activity can be thought of as corresponding to what?
A)a java project
B)a java class
C)a method call
D)an object field

Accepted Answer

An activity in the context of Android development corresponds to a single screen with a user interface, and it is typically implemented as a Java class (or Kotlin class in Kotlin projects) that extends the Activity class.

Question 19

To create an emulator, you need an AVD. What does it stand for?
A)android virtual display
B)android virtual device
C)active virtual device
D)application virtual display

Accepted Answer

AVD stands for Android Virtual Device. It is a configuration that defines the characteristics of an Android phone, tablet, Wear OS, or Android TV device that you want to simulate in the Android Emulator.

Question 20

The Android SDK ships with an emulator.

Accepted Answer

The Android SDK includes a mobile device emulator that simulates mobile devices for testing and development purposes.

Quiz 2: Android Application Development

What does the .apk extension stand for?

When you distribute your application commercially,you'll want to sign it with your own key.

How does Google check for malicious software in the Android Market?

Which of these are not one of the three main components of the APK?

What is the name of the program that converts Java byte code into Dalvik byte code?

What was the main reason for replacing the Java VM with the Dalvik VM when the project began?

Android Applications must be signed.

Which of the following are not a component of an APK file?

The AWT and Swing libraries have been removed from the Android library set.

The R.java file is where you edit the resources for your project.

What is contained within the manifest xml file?

What is contained within the Layout xml file?

The emulated device for android.

Your Java source code is what is directly run on the Android device.

The Emulator is identical to running a real phone EXCEPT when emulating/simulating what?

How is a simulator different from an emulator?

The R file is a(an) generated file

An activity can be thought of as corresponding to what?

To create an emulator, you need an AVD. What does it stand for?

The Android SDK ships with an emulator.