D308 Mobile Application Development (Android)
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Free D308 Mobile Application Development (Android) Questions
1. What is a primary requirement for an app to be published on the Google Play Store?
- The app must be developed using Kotlin or Java
- The app must pass a security review by Google
- The app must be free of bugs and errors
- The app must include in-app purchases
Explanation
Before being published on the Google Play Store, an app must pass a security review by Google. This review checks the app for malware, policy violations, and harmful content to protect users and maintain Play Store integrity. The review process includes both automated and manual checks. While Google recommends Kotlin or Java for Android development, apps can be built in other languages, and in-app purchases are optional, not mandatory.
2. What is a significant limitation of web applications compared to native applications?
- Enhanced offline capabilities
- Full access to device hardware features
- Limited access to device features and offline functionality
- Better performance on mobile devices
Explanation
A major limitation of web applications is their limited access to device features and offline functionality. Unlike native apps that can directly interact with hardware components such as GPS, cameras, and sensors, web apps run within a browser and are restricted by its capabilities. Additionally, most web apps require an active internet connection to function properly, limiting their usability in offline or low-connectivity environments.
3. Which of the following represents the 'Planning Stage' phase for developing Web Apps? This requires determining the audience/users, and prospective clients, and creating an Analytic Report which lists all the functionalities of the web application.
- Designing Layout, Interface Design, Wire Framing
- Research and Defining Audience
- Beta Testing and Bug Fixing
- Development and Execution
Explanation
The Planning Stage in web application development is best represented by Research and Defining Audience. This phase involves analyzing target users, identifying their needs, and understanding business goals to create a detailed analytic report. This report outlines the core functionalities, objectives, and technical requirements of the web app. Proper planning ensures that the development process is well-structured, efficient, and aligned with user expectations and organizational objectives.
4. What is responsive design?
- Design that frequently changes due to feedback from users
- Design that responds differently to users who have signed in with an account
- Design that can determine if a user is on a mobile device and automatically download an app
- Design that allows a website to change automatically depending on the size of the device
Explanation
Responsive design refers to the approach in web development that allows a website to automatically adjust its layout and elements depending on the device’s screen size and orientation. This ensures an optimal user experience across desktops, tablets, and smartphones without requiring separate versions of the site. Responsive design uses flexible grids, media queries, and fluid images to maintain readability and usability across various display types.
5. Which of the following is true about the Android Emulator?
- It is available for Windows and macOS but not for Linux.
- It can only emulate older versions of Android.
- It simulates the behavior of a physical Android device for testing apps.
- It requires a physical Android device to function.
Explanation
The Android Emulator simulates the behavior of a physical Android device, allowing developers to test applications in a virtual environment without needing real hardware. It replicates device functions such as calls, messages, location, sensors, and different Android versions. The emulator is available for Windows, macOS, and Linux, making it a flexible testing tool that helps ensure app performance and compatibility across various device configurations.
6. What is the mobile operating system for Windows?
- Windows 10 Mobile
- Windows Cellular
- Android
- Apple
Explanation
The mobile operating system developed by Microsoft for smartphones and tablets is Windows 10 Mobile. It was designed to provide a consistent experience across mobile and desktop devices by integrating with the Windows 10 ecosystem. Windows 10 Mobile supported features like the Continuum mode, which allowed mobile devices to function similarly to PCs when connected to external displays. However, it was eventually discontinued in favor of Android partnerships.
7. What is the primary role of a ViewController in an iOS application?
- To manage the app's data storage and retrieval
- To handle the logic and user interface for a specific screen
- To facilitate network communications between the app and external servers
- To define the overall architecture of the application
Explanation
The ViewController in an iOS application is responsible for handling the logic and user interface for a specific screen. Each ViewController manages the view hierarchy, user interactions, and transitions between screens. It acts as the bridge between the app’s data (Model) and the visual elements (View), following the Model-View-Controller (MVC) design pattern. This structure ensures organized, maintainable, and efficient app development.
8. Which is the greatest advantage of web-based applications?
- offline connectivity
- accessibility
- standard formatting
- secure content
Explanation
The greatest advantage of web-based applications is their accessibility. These applications can be accessed from any device with an internet connection and a web browser, without requiring installation. This cross-platform accessibility makes it easy for users to interact with the application regardless of their operating system or device type. It also simplifies updates and maintenance since changes made on the server side are instantly available to all users.
9. Which of the following strategies is most effective for optimizing a mobile application’s performance in terms of resource management?
- Implement lazy loading for images and data
- Increase the app's file size
- Use high-resolution graphics for all assets
- Disable background processes completely
Explanation
The most effective strategy for optimizing a mobile app’s performance in terms of resource management is implementing lazy loading for images and data. Lazy loading ensures that only the content currently needed by the user is loaded, while other elements are fetched as required. This approach reduces memory usage, improves loading times, and minimizes CPU and battery consumption—key factors in maintaining a smooth user experience, especially on devices with limited resources.
10. Which of the following is a key technology for implementing Android apps?
- Android Studio IDE (Integrated Development Environment)
- Java
- Android SDK (Software Development Kit)
- All of the above
Explanation
All of the listed technologies are key to implementing Android applications. Android Studio is the official IDE for developing Android apps, providing tools for coding, debugging, and testing. Java is one of the primary programming languages (alongside Kotlin) used for building Android applications. The Android SDK offers the essential libraries, APIs, and tools needed to create and integrate app features with the Android operating system. Together, these components form the foundation of Android development.
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