In AngularJS, modules are created using the __________ method.

  • angular.module()
  • create.module()
  • module.create()
  • ng.module()
In AngularJS, modules are created using the angular.module() method. This method is essential for organizing and structuring AngularJS applications. Modules help in managing dependencies, organizing code, and promoting modularity. Understanding how to create and use modules is crucial for building scalable and maintainable AngularJS applications.

How does lazy loading of modules affect AngularJS applications?

  • It has no impact on performance
  • It improves application performance
  • It increases initial loading time
  • It only affects the development environment
Lazy loading of modules in AngularJS improves application performance. It allows the application to load only the necessary modules when they are required, reducing the initial loading time and optimizing resource utilization. Understanding lazy loading is crucial for building scalable and efficient AngularJS applications, especially in large projects with multiple modules.

Explain a scenario where the use of $watch in AngularJS controllers for data binding might lead to performance issues.

  • Monitoring form input changes
  • Observing static configuration settings
  • Tracking user authentication
  • Watching large arrays or collections
Using $watch in AngularJS controllers for data binding might lead to performance issues in scenarios involving large arrays or collections. When monitoring extensive data sets with $watch, AngularJS has to constantly check for changes, which can be resource-intensive. This can result in decreased performance and responsiveness, especially in applications dealing with substantial amounts of dynamic data. Recognizing the limitations of $watch is crucial for optimizing data binding in AngularJS applications.

How does the digest cycle in AngularJS affect data binding performance in complex applications?

  • It accelerates data binding in all scenarios
  • It can degrade performance due to frequent evaluations
  • It has no impact on data binding performance
  • It improves performance by optimizing data binding
The digest cycle in AngularJS can affect data binding performance in complex applications. Frequent evaluations during the digest cycle, especially in large and complex applications, can lead to performance degradation. Developers should optimize data binding and be mindful of the number of watchers and the complexity of expressions to maintain efficient performance in AngularJS applications.

What is the significance of dependency injection in AngularJS?

  • Enhancing Code Readability
  • Improving Performance
  • Managing Component Dependencies
  • Minimizing Code Size
Dependency injection in AngularJS is significant for managing component dependencies. It is a design pattern that allows components to be loosely coupled by providing them with the required dependencies rather than letting them create these dependencies. This promotes modular and maintainable code, making it easier to manage and test components in isolation. Understanding dependency injection is crucial for building scalable and flexible AngularJS applications.

Explain the impact of $scope digestion cycle on performance optimization in AngularJS.

  • It can cause performance bottlenecks due to frequent digest cycles
  • It has no impact on performance
  • It improves performance by reducing digest cycle frequency
  • It is only relevant for debugging, not optimization
The $scope digestion cycle in AngularJS can impact performance optimization. Frequent digest cycles, especially when handling large datasets or complex bindings, can lead to performance bottlenecks. Developers need to be mindful of how data is bound and manipulated to optimize the digestion cycle for better AngularJS application performance.

How does $scope facilitate communication between the controller and the view?

  • By defining CSS styles for the application
  • By managing routing in the application
  • By using a bi-directional data binding
  • Through HTTP requests
$scope facilitates communication between the controller and the view in AngularJS through a bi-directional data binding mechanism. This means that changes made in the controller automatically reflect in the view, and vice versa. It streamlines the update process, making it efficient and reducing the need for manual DOM manipulation. A clear understanding of how $scope enables data binding is essential for effective AngularJS development.

Which AngularJS feature is essential for synchronizing the view with the model?

  • Component Lifecycle Hooks
  • Data Binding
  • Dependency Injection
  • Service Workers
Data Binding is the essential AngularJS feature for synchronizing the view with the model. Data Binding establishes a connection between the model and the view, ensuring that changes in one are reflected in the other. This bidirectional communication simplifies development, enhances code maintainability, and provides a seamless user experience in AngularJS applications.

Explain how scope isolation in directives benefits component-based architecture in AngularJS applications.

  • All of the above
  • Enables encapsulation of directive behavior
  • Enhances reusability of directives
  • Reduces the risk of naming conflicts
Scope isolation in directives benefits component-based architecture in AngularJS applications by providing encapsulation of directive behavior. It reduces the risk of naming conflicts and enhances reusability by allowing directives to function independently without interference from the surrounding scope. This approach facilitates the development of modular and maintainable components in AngularJS applications. Understanding the advantages of scope isolation is crucial for designing effective and scalable directives in AngularJS.

In a scenario where two controllers need to share data, how does $scope facilitate this interaction?

  • Directly accessing controller properties
  • Employing $watch and $digest
  • Using $broadcast and $on
  • Utilizing $http service
In AngularJS, $scope facilitates data sharing between controllers through the use of events. The $broadcast method is used to emit an event downwards through the scope hierarchy, and $on is employed to capture and handle the event in the target controller. This mechanism allows for effective communication between controllers, promoting modularity and maintainability in AngularJS applications.