The role of $injector in AngularJS's dependency injection mechanism is to resolve and inject dependencies into AngularJS components. It is responsible for managing the dependency injection process, ensuring that the required services or objects are available when needed. Understanding the $injector is essential for implementing and customizing dependency injection in AngularJS applications.

In AngularJS, the ng-component directive is used for creating reusable components that manage their own view. Components encapsulate both the template (view) and the logic (controller) associated with a specific part of the user interface. Using components enhances code organization, reusability, and maintainability in AngularJS applications.

In the MVC pattern of AngularJS, two-way data binding helps synchronize the Model and the Controller automatically. Two-way data binding allows changes in the Model to automatically update the Controller, and vice versa, without requiring manual intervention. This bidirectional synchronization simplifies the code and enhances the developer experience in AngularJS applications.

To optimize performance when implementing two-way data binding on large data sets in AngularJS, the trackBy function should be considered. The trackBy function is used with the ngFor directive to improve the efficiency of DOM updates by providing a unique identifier for each item in the data set. Understanding and using trackBy is crucial for enhancing the performance of AngularJS applications dealing with large data sets.

AngularJS handles two-way data binding in controllers through the ng-model directive. This directive binds an input, select, or textarea element to a property on the model, enabling synchronization between the view and the model. When the user interacts with the view, the model is updated, and vice versa, providing a seamless two-way data binding mechanism in AngularJS. Understanding ng-model is essential for building dynamic and interactive user interfaces.

Controller inheritance in AngularJS allows child controllers to inherit properties from their parent controllers. This feature enhances code reusability and helps maintain a consistent state across different parts of the application. Developers can leverage controller inheritance to create a hierarchical structure that simplifies the management of shared logic and data in complex AngularJS applications.

Controllers in AngularJS use the $scope object to interact with the view. The $scope object is a JavaScript object that serves as the glue between the controller and the view. It holds data and functions that can be accessed from the view, allowing seamless communication and data binding. Understanding how to utilize $scope is crucial for building dynamic and interactive AngularJS applications.

The primary function of the $scope object in AngularJS is to store and manage application data. It acts as a bridge between the controller and the view, allowing them to share data seamlessly. When the controller updates the $scope, the changes are reflected in the view, providing a dynamic and responsive user interface. Understanding the role of $scope is fundamental for building data-driven AngularJS applications.

$scope isolation in directives enhances component reusability by preventing unintended data modifications. It encapsulates the scope within the directive, minimizing the risk of external interference. This isolation promotes modularity and allows directives to be reused across different parts of an application without unintended side effects. Understanding $scope isolation is crucial for building maintainable and reusable components in AngularJS.

AngularJS utilizes Two-way Data Binding to automatically update the view when the model changes. Two-way Data Binding establishes a bidirectional link between the model and the view, ensuring that any changes in one reflect immediately in the other. This feature simplifies the code, reduces the need for manual DOM manipulation, and enhances the overall efficiency of AngularJS applications.