D308 Mobile Application Development (Android)

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Free D308 Mobile Application Development (Android) Questions

1.

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.
2.

What is a common drawback of using cross-platform development frameworks for mobile applications?

  • Increased development costs due to multiple codebases

  • Limited access to certain native device functionalities

  • Faster deployment times compared to native apps

  • Enhanced performance on all devices

Explanation

A common drawback of using cross-platform development frameworks is limited access to certain native device functionalities. While frameworks like Flutter and React Native allow developers to build apps for multiple platforms from a single codebase, they may not fully support some platform-specific APIs or hardware features. This can lead to reduced performance or missing functionalities compared to apps built natively for iOS or Android.

3.

A software application that runs in a smartphone, tablet, or other portable device is called:

  • an operating system.

  • a mobile application.

  • a driver.

  • a router.

Explanation

A mobile application (or mobile app) is a software program designed to operate on portable devices such as smartphones and tablets. These apps are tailored to the specific hardware and operating systems of mobile devices, offering functionality ranging from communication and entertainment to productivity and navigation. Mobile applications are typically downloaded from app distribution platforms like Google Play or Apple’s App Store.

4.

Which of the following is most important when selecting a language for a project/application? (Remember: Choose the best answer.)

  • The skills and abilities of the developers in your development team.

  • The purpose of your application.

  • The size of and number of people working on the project.

  • It depends. There is no single correct answer above.

Explanation

The best answer is It depends. There is no single correct answer above. Selecting a programming language depends on several factors—such as the project’s goals, required performance, scalability, platform compatibility, and the developers’ expertise. For example, Python may suit data analysis, Swift works best for iOS, while JavaScript is ideal for web applications. Therefore, no single factor is universally more important than the context of the project itself.
5.

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.
6.

Which of the following statements accurately describes a key difference between Java and Kotlin in Android development?

  • Java requires explicit declaration of variable types, while Kotlin supports type inference.

  • Kotlin does not support object-oriented programming, whereas Java does.

  • Java is the only language that can be used for Android development.

  • Kotlin is slower than Java in terms of execution speed.

Explanation

The main difference between Java and Kotlin is that Java requires explicit declaration of variable types, while Kotlin supports type inference. This means Kotlin can automatically determine a variable’s type based on its assigned value, resulting in cleaner and more concise code. Kotlin, endorsed by Google as an official Android development language, offers modern features such as null safety and functional programming, making it more developer-friendly compared to Java.
7.

Compatibility concerns in the context of OSs refer to:

  • The ability of an OS to work well with various software applications.

  • The level of compatibility between different hardware components.

  • The compatibility of an OS with legacy systems only.

  • The ease of updating an OS to the latest version.

Explanation

In the context of operating systems, compatibility concerns refer to the ability of an OS to work well with various software applications. This means that applications developed for a specific OS version should continue to function properly on newer versions. Compatibility ensures smooth operation between the OS, applications, and hardware, reducing system conflicts and maintaining user productivity across updates or different environments.

8.

What is a key benefit of using web applications in mobile development?

  • Higher performance compared to native apps

  • Access to device hardware features

  • Single codebase that simplifies updates

  • Better user experience than hybrid apps

Explanation

A key benefit of using web applications in mobile development is the single codebase that simplifies updates. Web apps run in browsers and do not require separate versions for different platforms, making maintenance and updates more efficient. Developers can make instant updates on the server side, which are reflected for all users without requiring downloads or installations. This reduces cost and complexity while ensuring consistent functionality across devices.

9.

What is React Native?

  • A game development engine

  • A software for 3D modeling

  • An open-source framework for building Android and iOS applications

  • A computer programming language

Explanation

React Native is an open-source framework developed by Meta (formerly Facebook) for building mobile applications for both Android and iOS platforms using a single JavaScript codebase. It allows developers to create native-like mobile apps with React components that directly render to native platform UI elements. React Native improves development speed, reusability of code, and cross-platform consistency while maintaining near-native performance.

10.

What would best describe an Activity when used within Android development?

  • Something that needs to be performed by the programmer to complete a task

  • Documentation that describes the activities that the application supports

  • A general term used to indicate any code developed by the programmer

  • A class (often with an associated layout) that typically represents a single screen

Explanation

In Android development, an Activity is a class (often with an associated layout) that represents a single screen within an application. Each Activity provides the user interface for one task, such as displaying a list of contacts or viewing an image. Activities manage user interactions, handle lifecycle events, and connect the app’s UI components with the underlying logic. Multiple activities can exist within one app, enabling structured navigation between screens.

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