MOBILE APPLICATION DEVELOPMENT - UNIT II

What is the role of the Linux Kernel in Android?

• The Linux Kernel is responsible for app development in Android.

• The Linux Kernel provides user interface elements for Android apps.

• The Linux Kernel acts as the core of the Android OS, managing hardware and system resources.

• The Linux Kernel manages only the Android applications without handling hardware.

Explain the function of the Android Runtime.

• The Android Runtime compiles applications into native code.

• The Android Runtime provides user interface design tools.

• The Android Runtime is responsible for device hardware management.

• The Android Runtime executes Android applications and manages memory and performance.

What is the Dalvik VM and how does it differ from ART?

• Dalvik VM is a web server for Android applications.

• ART is the original Android virtual machine using JIT compilation.

• Dalvik VM and ART are both used for iOS applications.

• Dalvik VM is the original Android virtual machine using JIT compilation, while ART is the newer runtime using AOT compilation for better performance.

Describe the purpose of the Application Framework in Android.

• To serve as a database for storing user data.

• The purpose of the Application Framework in Android is to provide a structured environment for building and managing applications, facilitating access to system resources and services.

• To manage network connections exclusively.

• To provide a platform for gaming applications only.

What is the Android emulator used for?

• To simulate Android devices for app development and testing.

• To manage Android device settings remotely.

• To run iOS applications on Android devices.

• To create Android apps without testing them.

How does virtualization relate to Android development?

• Virtualization is only used for server management.

• Virtualization enables the creation of virtual Android devices for testing and development.

• Virtualization is primarily for desktop application development.

• Virtualization has no impact on mobile app performance.

What are APIs and why are they important in Android?

• APIs are primarily for data storage in Android.

• APIs are not relevant to accessing device features.

• APIs are only used for web development.

• APIs are essential in Android for enabling communication between applications and accessing device features.

Can you explain the Android File System structure?

• The Android File System has no specific structure and is random

• /bin, /usr, /lib, and /tmp are the main directories

• The Android File System structure includes directories like /system, /data, /cache, and /sdcard, with app data stored in /data/data/.

• App data is stored in /system/app/

What are the key components of a basic Android application?

• Activities, Services, Broadcast Receivers, Content Providers

• Fragments, Intents, ViewModels, Layouts

• Content Providers, Activities, Permissions, Layouts

• Widgets, Activities, Services, Themes

Outline the Activity Lifecycle and its significance in Android.

• onLaunch(), onClose(), onTerminate()

• The Activity Lifecycle includes states: onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy(), which are significant for managing app resources and user interactions.

• onBegin(), onActive(), onEnd()

• onInitialize(), onDisplay(), onExit()