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Questions and Answers
What does MVC stand for in software design?
What does MVC stand for in software design?
MVVM is also known as model-view-binder. (True/False)
MVVM is also known as model-view-binder. (True/False)
True
What does MVVM stand for?
What does MVVM stand for?
What is the main difference between MVC and MVVM in terms of the mediator component?
What is the main difference between MVC and MVVM in terms of the mediator component?
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What is the primary role of the Model in the MVVM pattern?
What is the primary role of the Model in the MVVM pattern?
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MVVM separates program logic and user interface controls through Model-View-______ pattern.
MVVM separates program logic and user interface controls through Model-View-______ pattern.
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In MVVM, the View has a reference to the Controller.
In MVVM, the View has a reference to the Controller.
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What is the main purpose of the ViewModel in the MVVM pattern?
What is the main purpose of the ViewModel in the MVVM pattern?
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MVVM separates program logic and user interface controls through the Model-View-____________ pattern.
MVVM separates program logic and user interface controls through the Model-View-____________ pattern.
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Match the following MVVM components with their descriptions:
Match the following MVVM components with their descriptions:
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What is the name of the Microsoft's internet equivalent multimedia plug-in that uses MVVM?
What is the name of the Microsoft's internet equivalent multimedia plug-in that uses MVVM?
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In MVVM, the View contains logic.
In MVVM, the View contains logic.
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What is the main difference between MVVM and MVC in terms of the mediator component?
What is the main difference between MVVM and MVC in terms of the mediator component?
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Who created the MVVM pattern?
Who created the MVVM pattern?
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MVVM is used in ______________ (WPF), which runs on Microsoft's .NET.
MVVM is used in ______________ (WPF), which runs on Microsoft's .NET.
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What is the main goal of the MVVM pattern?
What is the main goal of the MVVM pattern?
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Study Notes
Model-View-Controller (MVC) Pattern
- MVC is a software design pattern used to implement user interfaces, data, and controlling logic.
- It emphasizes a separation between the software's business logic and display, providing a better division of labor and improved maintenance.
- MVC provides a clear separation of business logic, UI logic, and input logic.
- It offers full control over HTML and URLs, making it easy to design web application architecture.
- MVC supports Test Driven Development (TDD).
Components of MVC
- Model: Manages data and business logic. Defines what data the app should contain. Notifies the view and sometimes the controller if the state of the data changes.
- View: Handles layout and display. Defines how the app's data should be displayed. Created by the data collected by the model component, but not directly taken from the model.
- Controller: Contains logic that updates the model and/or view in response to input from the users of the app.
Advantages of MVC
- Easy to maintain and extend codes
- Supports TDD
- Components can be developed simultaneously
- Reduces complexity by dividing an application into three units
- Works well for Web apps supported by large teams of web designers and developers
- SEO friendly
Disadvantages of MVC
- Difficult to read, change, test, and reuse
- Not suitable for building small applications
- Inefficient data access in view
- Framework navigation can be complex
- Increased complexity and inefficiency of data access
Model-View-ViewModel (MVVM) Pattern
- MVVM is a software design pattern that separates program logic and user interface controls.
- It is structured to separate program logic and user interface controls.
Components of MVVM
- Model: Represents the app's domain model, including data model, business, and validation logic. Communicates with the ViewModel.
- View: Collects visible elements, receives user input, and does not interact with the Model directly.
- ViewModel: Located between the View and Model layers, contains logic for interacting with the View, and binds the UI elements in View to the controls in ViewModel.
Advantages of MVVM
- Easier to develop, test, and maintain
- Separation of View from logic allows different teams to work on different components simultaneously
- Easier to test, as ViewModel and Model are independent from the View
- Code is simpler and cleaner, making it easier to understand and implement new features
Disadvantages of MVVM
- Complexity, especially when creating simple user interfaces
- Difficult to debug due to declarative data binding
- Can be overkill for simple projects
MVC Pattern
- A software design pattern used to implement user interfaces, data, and controlling logic.
- Emphasizes a separation between the software's business logic and display.
- Provides a clear separation of business logic, UI logic, and input logic.
- Offers full control over HTML and URLs, making it easy to design web application architecture.
- Features: powerful URL-mapping component, supports Test Driven Development (TDD).
The Three Parts of MVC
- Model: Manages data and business logic. Notifies the view and sometimes the controller if its state changes.
- View: Handles layout and display. Defines how the app's data should be displayed.
- Controller: Routes commands to the model and view parts.
MVVM Pattern
- A software design pattern that separates program logic and user interface controls.
- Also known as model-view-binder, created by Microsoft architects Ken Cooper and John Gossman.
- Used in Windows Presentation Foundation (WPF) and Silverlight.
The Separate Code Layers of MVVM
- Model: Represents the app's domain model, including data model, business, and validation logic. Communicates with the ViewModel.
- View: The collection of visible elements, receives user input. Includes user interfaces (UI), animations, and text.
- ViewModel: Located between the View and Model layers, houses controls for interacting with View, and binds UI elements to controls.
MVVM vs. MVC
- Mediator: In MVC, the mediator is the Controller, while in MVVM, it's the ViewModel.
- Logic: In MVC, the View contains logic, whereas in MVVM, the logic resides in the ViewModel.
- Reference: In MVC, the View doesn't have a reference to the Controller, but in MVVM, the View has a reference to the ViewModel.
Advantages of MVVM
- Easier to develop: Separation of View and logic allows for simultaneous work on different components.
- Easier to test: ViewModel and Model are independent of the View, making it easier to write tests.
- Easier to maintain: Separation of components makes the code simpler and cleaner.
Disadvantages of MVVM
- Complexity: MVVM can be overkill for simple user interfaces, and designing the ViewModel can be difficult.
- Debugging: Declarative data binding can make debugging harder than traditional, imperative code.
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Description
Learn about the Model-View-Controller and Model-View-ViewModel patterns, their importance in software design, and how they provide a separation of concerns for better development and maintenance.
