D308 Mobile Application Development (Android)
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Free D308 Mobile Application Development (Android) Questions
1. What is the role of Android Intents?
- To manage app permissions.
- To declare app components.
- To define app resources.
- To enable communication between Android components.
Explanation
The role of Android Intents is to enable communication between Android components. Intents are messages used to request an action from another app component, such as starting an activity, sending data to another app, or broadcasting system events. They help coordinate interactions between different parts of an app or even between different apps, supporting modular and flexible app development in the Android ecosystem.
2. What is a key difference in the app approval process between iOS and Android platforms?
- iOS apps require a thorough review by Apple before publication, while Android apps can be published more rapidly.
- Android apps must undergo a lengthy review process similar to iOS apps.
- Both iOS and Android apps are published instantly without any review.
- iOS apps can be published immediately without any approval process.
Explanation
A key difference in the app approval process between iOS and Android platforms is that iOS apps undergo a thorough review by Apple before being published on the App Store. This review ensures compliance with Apple’s strict security, performance, and design standards. In contrast, Android apps can be published on Google Play more quickly after an automated review process, allowing faster updates and distribution but with less stringent initial oversight.
3. An application developer needs to test an application across all of the operating systems used by the company. Each operating system will be tested individually in a lab environment. The company would like to minimize any additional hardware purchases for this project. Which of the following would be the best way to test this application?
- Purchase a system that is configured just above the hardware requirements for the highest-end operating system. Create separate VMs for each operating system.
- Purchase individual test computers that match the hardware requirements for each OS. Install different operating systems on each test computer.
- Designate existing user workstations to be used as testing systems. Run all application tests during non-working hours.
- Purchase a system that matches the minimum hardware requirements for the highest-end operating system. Create a system image for each OS.
Explanation
The best approach is to purchase a system that is configured just above the hardware requirements for the highest-end operating system and create separate virtual machines (VMs) for each OS. Virtualization allows multiple operating systems to run on a single physical machine, minimizing hardware costs while providing isolated environments for testing. Each VM can be configured independently, enabling efficient testing across various OS platforms without affecting the host system.
4. Which of the following best describes the primary characteristic of hybrid mobile applications?
- They are built exclusively using native programming languages.
- They utilize web technologies within a native container.
- They require separate codebases for each platform.
- They are only compatible with iOS devices.
Explanation
Hybrid mobile applications primarily utilize web technologies within a native container. They are built using web languages such as HTML, CSS, and JavaScript but wrapped inside a native shell that allows access to device features like GPS or camera. This enables hybrid apps to be deployed across multiple platforms while maintaining some native-like capabilities, though they generally sacrifice performance compared to fully native applications.
5. What is a common drawback of using hybrid applications compared to native applications in mobile development?
- Higher development costs
- Limited access to device features
- Performance may not be as good as native apps
- Longer time to market
Explanation
A common drawback of hybrid applications is that their performance may not match that of native apps. Hybrid apps rely on web technologies wrapped in a native container, which can cause slower load times and less responsive interactions. Since they aren’t fully optimized for specific operating systems, hybrid apps may experience reduced efficiency and limited access to advanced hardware capabilities compared to native apps that are built specifically for each platform.
6. _____ is based on the React web framework from Facebook. It uses JS and translates from JS code to native components and code using a JavaScript bridge.
- React Native
- NativeScript
- Flutter
- Xamarin
Explanation
React Native is based on Facebook’s React web framework and uses JavaScript to build mobile applications. It translates JavaScript code into native components using a JavaScript bridge, allowing developers to create apps that perform like true native applications on both iOS and Android platforms. This approach enables code reuse across multiple platforms while maintaining high performance and a native look and feel.
7. During the planning phase of mobile application development, what is the primary purpose of creating wireframes?
- To define the app's backend architecture
- To outline the app's user interface and functionality
- To establish the app's marketing strategy
- To select the programming languages for development
Explanation
The primary purpose of creating wireframes during the planning phase is to outline the app’s user interface and functionality. Wireframes serve as visual blueprints that represent the app’s layout, navigation flow, and key elements without detailed design or code. They help developers and stakeholders understand how users will interact with the app, ensuring usability and efficient functionality before moving on to detailed design and development stages.
8. Windows _____ is a legacy operating system that was used for early Microsoft powered smartphones and portable handheld devices.
- Windows Mobile
- Windows 8.1
- Windows RT
- Windows 8
Explanation
Windows Mobile is the legacy operating system developed by Microsoft for early smartphones and handheld devices. It was designed to bring desktop-like functionality to mobile hardware before the introduction of Windows Phone and later Windows 10 Mobile. Windows Mobile supported third-party applications and offered features like touch navigation, email synchronization, and limited multitasking, but it was eventually replaced due to evolving mobile technology and platform competition.
9. What type of app runs in a browser?
- Portal app
- Mobile app
- Desktop app
- Web app
Explanation
A Web app runs directly within a web browser and does not require installation on the device. It uses web technologies such as HTML, CSS, and JavaScript to deliver functionality similar to native apps. Users can access web apps through URLs, making them platform-independent and easily updatable without requiring downloads or manual updates. Examples include Gmail, Google Docs, and online banking applications.
10. To what platform do Android developers currently publish apps?
- Google Play app store
- App Store
- Cydia
- The Android Market
Explanation
Android developers currently publish their apps to the Google Play app store, which is the official distribution platform for Android applications. Managed by Google, the Play Store allows developers to reach billions of users, manage app updates, and track performance metrics. Other listed options, such as the App Store (for iOS) and Cydia (for jailbroken devices), are unrelated to Android, and the Android Market was replaced by Google Play in 2012.
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