D308 Mobile Application Development (Android)
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Free D308 Mobile Application Development (Android) Questions
1. 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.
2. Which of the following statements accurately describes Xcode in the context of mobile application development?
- Xcode is primarily used for developing Android applications.
- Xcode is a cloud-based platform for app distribution.
- Xcode serves as the official integrated development environment for iOS, iPadOS, watchOS, and macOS applications.
- Xcode is a cross-platform development tool that supports multiple programming languages.
Explanation
Xcode serves as the official Integrated Development Environment (IDE) for developing applications for Apple platforms, including iOS, iPadOS, watchOS, and macOS. It provides tools for designing user interfaces, writing and testing Swift or Objective-C code, and submitting apps to the Apple App Store. Xcode includes features like simulators, debugging tools, and performance analyzers, making it essential for Apple ecosystem app development.
3. What is an Activity in Android?
- A background service running on Android devices.
- A user interface element used for displaying data.
- A core component representing a single screen with a user interface.
- A data storage mechanism in Android.
Explanation
An Activity in Android represents a single screen with a user interface—essentially, it’s one of the building blocks of an Android app. Each Activity corresponds to what the user sees and interacts with, such as a login screen or settings page. Activities manage the lifecycle of user interactions, handle navigation between screens, and respond to user input. Every Android app typically contains one or more Activities.
4. What is the primary reason mobile applications request user permissions for accessing device features?
- To enhance user experience by providing personalized content
- To ensure compliance with data protection regulations
- To allow the app to function correctly by accessing necessary resources
- To collect user data for marketing purposes
Explanation
The primary reason mobile applications request user permissions is to allow the app to function correctly by accessing necessary resources. Many mobile apps need access to device components such as the camera, microphone, location, or storage to perform their intended tasks. For example, a navigation app requires GPS access, while a messaging app may need access to contacts or media. These permissions ensure core functionalities work as designed while protecting user privacy through explicit consent.
5. What is a significant drawback of developing native applications for multiple platforms?
- Increased complexity in user interface design
- Higher costs associated with app marketing
- Separate codebases for each platform, leading to longer development cycles
- Limited access to device features
Explanation
A major drawback of developing native applications for multiple platforms is the need to maintain separate codebases for each one, which extends development time and increases costs. Native apps must be individually coded for Android (using Kotlin or Java) and iOS (using Swift or Objective-C). This results in duplicated effort, more complex maintenance, and longer update cycles, as each version of the app must be developed, tested, and deployed separately.
6. Native applications have the following characteristics, except ________.
- They are expensive to develop and support.
- They can be run on multiple operating systems without modifications.
- They are highly secure and easy to use.
- They can use the unique capabilities of the hardware device.
- They can run only a single type of device.
Explanation
The incorrect statement is “They can be run on multiple operating systems without modifications.” Native applications are designed specifically for one platform (e.g., Swift for iOS or Kotlin for Android), meaning they cannot run on multiple operating systems without being rewritten. Native apps, however, offer superior performance, security, and access to device-specific features, which makes them highly reliable for platform-optimized functionality.
7. What is the primary purpose of using segues in an iOS application?
- To manage data storage
- To transition between view controllers
- To handle network requests
- To implement animations
Explanation
The primary purpose of segues in an iOS application is to transition between view controllers. Segues define how one screen (view controller) connects to another, managing navigation flow within the app. They can be triggered through user actions, such as tapping a button, and can include animations or data passing between views. In Interface Builder, segues visually represent these transitions, ensuring smooth and organized navigation throughout the app.
8. 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.
9. What is a crucial aspect of maintaining a mobile application after its initial release?
- Regularly updating the app's user interface
- Ensuring compatibility with the latest operating system updates
- Increasing the app's storage requirements
- Adding new features without testing
Explanation
A crucial aspect of maintaining a mobile application after its release is ensuring compatibility with the latest operating system updates. Mobile platforms like Android and iOS frequently update their operating systems, which can affect app performance or functionality. Developers must test and update their apps to remain stable, secure, and compatible. Regular maintenance also prevents crashes, improves security, and enhances user satisfaction by keeping the app aligned with current system requirements.
10. What is the primary purpose of using emulators and simulators in mobile application development?
- To test applications on actual devices
- To simulate the behavior of mobile devices for testing
- To create native applications
- To distribute apps to users
Explanation
The primary purpose of emulators and simulators in mobile app development is to simulate the behavior of mobile devices for testing. These tools replicate the hardware and software environment of real devices, allowing developers to test app performance, layout, and functionality without requiring multiple physical devices. Emulators are typically used for Android, while simulators are common for iOS, providing a convenient, cost-effective way to detect and fix issues before deployment.
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