If you want to project content but also need to wrap it with additional styling or behavior, you might consider using ________ instead of plain content projection.
- Encapsulation
- Inheritance
- Transclusion
- Transpilation
If you want to project content but also need to wrap it with additional styling or behavior, you might consider using Transclusion instead of plain content projection. Transclusion allows you to wrap the projected content with additional HTML, CSS, or behavior while preserving the original content. It is a technique commonly used in Angular for creating reusable components.
You are developing a multi-tenant application where each tenant may require slightly different service implementations. How can you achieve this in Angular without duplicating a lot of code?
- Create separate Angular applications for each tenant, each with its unique service implementation.
- Create separate Angular modules for each tenant with their service implementations.
- Duplicate the service code for each tenant and load the respective service based on the tenant's login.
- Use Angular dependency injection to provide different service instances based on the tenant context.
In a multi-tenant Angular application, you can use Angular's dependency injection to provide different service instances based on the tenant context. This avoids code duplication and maintains a modular and maintainable codebase. Creating separate modules for each tenant can also work but may be less dynamic and flexible than using dependency injection.
In terms of performance optimization, why is Ahead-of-Time (AOT) compilation beneficial for Angular applications?
- AOT allows for better code splitting and lazy loading
- AOT enhances the developer experience by enabling hot module reloading
- AOT improves runtime execution speed through just-in-time compilation
- AOT reduces the bundle size by eliminating the need for the Angular compiler in the browser
Ahead-of-Time (AOT) compilation in Angular is beneficial for performance optimization because it reduces the bundle size by precompiling templates and removing the need for the Angular compiler to be shipped to the browser. Smaller bundles result in faster loading times for the application.
To dynamically create a component and attach it to a specific location in the view, you'd use the ______ along with ComponentFactoryResolver.
- ComponentLoader
- DynamicInjector
- ViewChild
- ViewContainerRef
To dynamically create and attach components in Angular, you use the ViewContainerRef along with ComponentFactoryResolver. ViewContainerRef provides access to the view where you want to insert the component, and ComponentFactoryResolver helps create and manage the component instance. ViewChild is a decorator used to access child components, but it's not directly related to creating components dynamically. ComponentLoader and DynamicInjector are not standard Angular concepts in this context.
When you want to run logic before a route's data is resolved, you should implement the Resolve<________> interface in Angular.
- Resolve
- Resolve
- Resolve
- Resolve
In Angular, when you want to run logic before a route's data is resolved, you should implement the Resolve interface. This allows you to define a resolver service that can fetch data or perform actions before the route is activated, ensuring that the required data is available when the route component is loaded.
Which method of ViewContainerRef allows you to insert a component?
- createComponent()
- deleteComponent()
- updateComponent()
- renderComponent()
The method of ViewContainerRef that allows you to insert a component is createComponent(). This method is used to create and insert a dynamic component into the specified view container. The other options are not valid methods of ViewContainerRef and do not serve the purpose of inserting components.
How can you simulate a click event on an element during Angular unit testing?
- Angular unit tests cannot simulate click events.
- By manually dispatching a click event on the DOM element.
- Using the click method provided by the TestBed utility.
- Using the simulateClick function from the @angular/testing package.
To simulate a click event on an element during Angular unit testing, you can manually dispatch a click event on the DOM element using the dispatchEvent method. This allows you to trigger the same behavior that a real user would experience when clicking the element.
What tool is responsible for executing tests in a browser when testing Angular applications?
- Istanbul
- Jasmine
- Karma
- Protractor
Karma is a test runner tool that is responsible for executing tests in a browser when testing Angular applications. It launches the browser, captures it, and runs the tests in a real browser environment, allowing you to test your application as it would run in production.
What would you use to capture and act upon route parameters passed in a URL in Angular?
- ActivatedRouteSnapshot and RouteParams
- Router and ActivatedRoute
- ActivatedRoute and Router
- RouteData and RouteSnapshot
To capture and act upon route parameters in Angular, you would use ActivatedRouteSnapshot and RouteParams. These are part of the Angular Router and provide access to the parameters passed in the URL, allowing you to utilize them in your components. The other options may be components of the Angular Router, but they are not the primary tools for capturing and acting upon route parameters.
What is the primary difference between Observables and Promises?
- Observables are only used for HTTP requests, while Promises are for other asynchronous tasks
- Observables can handle multiple values over time, while Promises handle a single value
- Promises are asynchronous, while Observables are synchronous
- Promises are part of JavaScript, while Observables are part of Angular
The primary difference is that Observables can handle multiple values over time, while Promises handle a single value. Observables are often used for handling streams of data, such as events, real-time updates, or user input. Promises are better suited for handling a single asynchronous operation.