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Mobile application Questions & Answers

Free download in PDF Mobile application Questions & Answers. These multiple choice questions on Computer Science are very useful for NIELIT, BCA, B.Sc. MCA, M.Sc. B.Tech, M.Tech, BE, ME students an interview for various positions like Web Developer, System Analyst etc.
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101 Android Applications must be signed.
[A] After they are installed
[B] Before they are installed
[C] Never
[D] Within two weeks of installation
Answer: Before they are installed
102 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 Librariesr
[D] Dalvik executable
Answer: All of these are components of the APK
103 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
Answer: The permissions the app requires
104 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.
Answer: Runs the same code base as the actual device, all the way down to the machine layer.
105 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
Answer: Sensors
106 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.
Answer: The emulator imitates the machine executing the binary code, rather than simulating the behavior of the code at a higher level.
107 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
Answer: A Java class
108 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
Answer: Android Virtual Device
109 The ___________ file specifies the layout of your screen.
[A] Layout file
[B] Manifest file
[C] Strings XML
[D] R file
Answer: .Layout file
110 While developing Android applications, developers can test their apps on…
[A] Emulator included in Android SDK
[B] Physical Android phone
[C] Third-party Emulators (Youwave, etc.)
[D] All three options will work.
Answer: All three options will work.
111 What file is responsible for glueing everthing together , explaining what the applicatin consists of, what its main building blocks are, ext…?
[A] Layout file
[B] Strings XML
[C] R file
[D] Manifest file
Answer: Manifest file
112 The XML file that contains all the text that your application uses.
[A] stack.xml
[B] text.xml
[C] strings.xml
[D] string.java

Answer: strings.xml
113 Which of the following is the most “resource hungry” part of dealing with Activities on Android
[A] Closing an app
[B] Suspending an app
[C] Opening a new app
[D] Restoring the most recent app

Answer: Opening a new app
114 What runs in the background and doesn’t have any UI components?
[A] Intents
[B] Content Providers
[C] Services
[D] Applications

Answer: Services
115 What is an Activity?
[A] A single screen the user sees on the device at one time
[B] A message sent among the major building blocks
[C] A component that runs in the background without any interface.
[D] Context referring to the application environment.
Answer: . A single screen the user sees on the device at one time
116 When an activity doesn’t exist in memory it is in.
[A] Starting state
[B] Running state
[C] Loading state
[D] Inexistent state.
Answer: Starting state
117 Which of the following is NOT a state in the lifecycle of a service?
[A] Starting
[B] Running
[C] Destroyed
[D] Paused
Answer: Paused
118 Intents
[A] are messages that are sent among major building blocks
[B] trigger activities to being, services to start or stop, or broadcast
[C] are asynchronous
[D] all of these
Answer: all of these
119 Broadcast receivers are Android’s implementation of a system-wide publish/subscribe mechanism, or more precisely, what design pattern?
[A] Observer
[B] Facade
[C] Mediator
[D] Command
Answer: Observer
120 What built-in database is Android shipped with?
[A] SQLite
[B] Apache
[C] MySQL
[D] Oracle
Answer: SQLite
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