Mobile App Development

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Questions and Answers

What is a primary characteristic of freemium apps?

They are free to download with no additional costs.

They require a subscription for full access.

They include in-app purchases while remaining free. (correct)

They are paid applications that offer free trials.

Which programming language is used primarily for iOS development?

Swift (correct)

Dart

JavaScript

Java

Which mobile development framework is designed for cross-platform development?

React Native (correct)

Android Studio

Swift

Xcode

What is included in the mobile app development lifecycle?

Testing Signup and view all the answers

What is a common monetization model for Android apps?

Free apps that generate revenue through advertisements. Signup and view all the answers

What is a primary advantage of Clean Architecture related to the handling of different components?

Separation of Concerns Signup and view all the answers

What is a notable disadvantage of Clean Architecture that affects development time?

Steep learning curve Signup and view all the answers

Which component in an e-commerce app is responsible for user interactions like pressing the 'Add to Cart' button?

Controller Signup and view all the answers

In the context of Clean Architecture, what does the Use Case 'AddProductToCart' primarily interact with?

The Product entity to manage inventory Signup and view all the answers

Which of the following could be considered a best practice in mobile app development?

Mobile app performance optimization Signup and view all the answers

What is the primary role of the Model in MVC architecture?

To represent the data and business logic independently of the user interface. Signup and view all the answers

Which component of MVC architecture is responsible for controlling the flow of data to the View?

Controller Signup and view all the answers

What is a disadvantage of using MVC architecture?

Increased complexity. Signup and view all the answers

In MVC architecture, which component is primarily responsible for communicating UI updates to the Model?

Controller Signup and view all the answers

Which of the following is NOT an advantage of MVC architecture?

Ease of integration with third-party APIs. Signup and view all the answers

In an e-commerce app using MVC, which part holds the business logic for adding items to the cart?

Model Signup and view all the answers

How does the View in MVC architecture update its displayed data?

By receiving updates from the Controller. Signup and view all the answers

What contributes to tight coupling between the View and Controller in MVC architecture?

Direct communication paths for user inputs. Signup and view all the answers

What is a significant advantage of Android development compared to iOS development?

Ability to develop on any platform Signup and view all the answers

Which of the following is a disadvantage of using Android as a development platform?

Fragmentation due to different OS versions Signup and view all the answers

What year was iOS, initially developed for the iPhone, released?

2007 Signup and view all the answers

What is one of the main reasons iOS has less fragmentation compared to Android?

Uniform hardware amongst devices Signup and view all the answers

Which layer is NOT part of the iOS architecture?

User Interface layer Signup and view all the answers

Which of the following statements about the App Store is true for iOS development?

The App Store has detailed guidelines for app submission Signup and view all the answers

What is a characteristic of the Android environment that supports better inter-app communication?

Ability to share call history Signup and view all the answers

What challenge do app developers face when targeting Android compared to iOS?

Custom OS modifications delaying updates Signup and view all the answers

What is the purpose of the Entities in Clean Architecture?

To contain core business logic and rules, independent of UI. Signup and view all the answers

What is the primary role of the Controller in the MVVM architecture?

It listens for user interactions and updates the Model. Signup and view all the answers

Which layer in Clean Architecture handles data transformation for display?

Interface Adapters Signup and view all the answers

Which component is responsible for managing the app’s data and business logic?

Model Signup and view all the answers

What does the Use Cases layer primarily orchestrate?

The data flow between the UI and the Entities. Signup and view all the answers

What is a key advantage of implementing MVVM architecture?

Separation of concerns through distinct components. Signup and view all the answers

Which statement is true about the Frameworks & Drivers layer?

It includes elements like APIs and databases. Signup and view all the answers

What does the View in MVVM primarily do?

Displays data and observes the ViewModel. Signup and view all the answers

What principle does Clean Architecture emphasize regarding layer dependencies?

Inversion of control principle. Signup and view all the answers

In the MVVM architecture, what does the ViewModel handle?

The presentation logic and interaction with the View. Signup and view all the answers

Which layer is responsible for core business logic reusability?

Entities Signup and view all the answers

Which of the following describes a key function of the Interface Adapters layer?

To keep the UI separate from underlying data sources. Signup and view all the answers

How does Clean Architecture facilitate testing?

By isolating business logic in the Entities layer. Signup and view all the answers

In a weather app using MVVM, which task does the ViewModel typically perform?

Formatting weather data for presentation. Signup and view all the answers

What does the observable properties in the ViewModel allow the View to do?

Update its user interface automatically when data changes. Signup and view all the answers

Study Notes

Class Rules

Students can do anything except make noises (chatting, singing, etc.).
Students are welcome to interrupt with questions.
Attendance is required, according to university policy.
An 80% attendance rate is necessary to sit the final exam.

Course Assessment

Final Exam: 50%
Midterm: 20%
Quizzes: 10%
Project: 20% (2-3 members per group, report and presentation required).
Cheating and plagiarism will not receive any marks.

Mobile Devices

Mobile devices are portable handheld computers designed for Internet connection, easy-to-use, and portable.
Some mobile devices are more powerful than others enabling various functions similar to desktop or laptop computers.
Primary devices include tablet computers, e-readers, and smartphones.

Mobile Application Development

Mobile app development creates software applications for smartphones and tablets.
Software apps can be developed for different operating systems (OS).

Types of Mobile Applications

Native Apps: Built for a specific OS (e.g., Java/Kotlin for Android, Swift/Objective-C for iOS). They leverage device-specific features.
Hybrid Apps: Created using web technologies (HTML, CSS, JavaScript) and frameworks. Installed like native apps.
Web Apps: Accessed through mobile browsers (e.g., Progressive Web Apps, PWAs). Do not require installation but have limited device hardware access.

Mobile Platforms

Android: Google's widely used mobile OS, developed in Java, Kotlin, and C++. Open ecosystem.
iOS: Apple's proprietary OS for iPhones and iPads, known for security, easy use, and strict app store guidelines.
Other platforms (e.g., Windows Mobile, Blackberry) are less common.

Mobile Operating Systems

Various mobile operating systems exist, including Palm OS, WML, J2ME, Windows, Android, and iOS.

Android Pros & Cons

Pros: Develop on any platform, open environment (call history, notifications, app installation from various sources, self-signed apps), publishing to Google Play for a one-time fee.
Cons: Fragmentation between different OS versions (often significantly different), upgrades through manufacturers and carriers (slow), app developers need to support different OS versions.

iOS Pros & Cons

Pros: Less fragmentation, new features quickly available, standard OpenGL API for graphics, adaptable interface design for the user.
Cons: More closed platform with limited inter-app communication, only develops on Macs, subscription to iOS developer program (annual fee), complicated app submission guidelines, lengthy app signing process, and Apple certificate is required for device installation.

App Stores & Monetization

App stores: Dominant app distribution platforms are Google Play Store and Apple App Store.
Monetization models: Free apps with ads, Freemium (free with in-app purchases), paid apps.
Subscriptions are an increasing trend for content or service apps (e.g., Netflix, Spotify or news apps).