You are working on a project where the client has specific linting rules. How can you modify the existing linting rules of an Angular CLI project?
- Modify the .angular-cli.json file
- Modify the .eslintrc.json file
- Modify the package.json file
- Modify the tslint.json file
To modify the linting rules of an Angular CLI project, you should edit the .eslintrc.json file. This file contains the configuration for ESLint, allowing you to customize linting rules to meet the client's specific requirements.
What is the purpose of the compileComponents method in Angular testing?
- It compiles Angular components for Ahead-of-Time (AOT) compilation.
- It compiles CSS stylesheets for production use.
- It compiles TypeScript code for runtime execution.
- It compiles templates for Just-in-Time (JIT) compilation.
The compileComponents method in Angular testing is used to compile components and their associated templates. This is particularly useful for Ahead-of-Time (AOT) compilation, as it ensures that templates are correctly compiled and ready for testing. It helps catch template-related errors early in the development process.
You have a registration form where users must enter their password twice to confirm it. How would you ensure both password fields match?
- Use a JavaScript function to compare the two password fields when the form is submitted.
- Utilize Angular's built-in password validation feature.
- Implement server-side validation to compare the password fields.
- Apply a CSS style to visually indicate password match or mismatch.
To ensure both password fields match, it's essential to implement server-side validation. Client-side validation (Option 1) can be bypassed, and Angular's built-in features (Option 2) may not provide the necessary security. A CSS style (Option 4) can enhance user experience but doesn't enforce the match. Server-side validation is the most reliable method.
In a scenario where you need to load some configuration data before determining if a route can be activated, which guard would be the most appropriate to use?
- CanActivate
- CanActivateChild
- CanLoad
- Resolve
In this scenario, the Resolve guard is the most appropriate. It allows you to fetch data or perform operations before activating a route. This can be useful for loading configuration data asynchronously before the route activation is determined.
To dynamically create components at runtime, one should use the ________ service.
- ComponentFactoryResolver
- ChangeDetectionStrategy
- AngularInjector
- DependencyInjection
To dynamically create components at runtime in Angular, you should use the ComponentFactoryResolver service. This service allows you to resolve and create components dynamically, a valuable feature when dealing with dynamic UI elements or component-based applications. The other options are not related to dynamic component creation.
If a route's path is set as an empty string (''), it often represents the ________ route of the application.
- Default
- Home
- Primary
- Root
If a route's path is set to an empty string (''), it typically represents the Root route of the application. This means that when the application is accessed without any specific route, the route with an empty path ('') will be considered, often serving as the main entry point or home page of the application.
For guards that determine whether a module should be loaded or not, the method ______ should return a boolean or an observable that resolves to a boolean.
- canActivate
- canActivateChild
- canDeactivate
- canLoad
When working with guards that determine whether a module should be loaded or not, the canLoad method should return a boolean or an observable that resolves to a boolean. This guard is used to control the lazy loading of feature modules.
If you need to clear all views from a ViewContainerRef, you would use the ______ method.
- clearViews()
- emptyContainer()
- purgeViews()
- removeAll()
To clear all views from a ViewContainerRef in frameworks like Angular, you would use the emptyContainer() method. This method removes all attached views, providing a clean slate for rendering new components or views in the container. It's an important function for managing dynamic user interfaces.
How can you share a service instance between multiple lazy-loaded modules in Angular?
- Manually create a service instance in each lazy-loaded module
- Provide the service in a shared module and import that module into each lazy-loaded module
- Use Angular's built-in lazy-loading service provider
- Use the 'shared' attribute in the service decorator
To share a service instance between multiple lazy-loaded modules, you should provide the service in a shared module and then import that shared module into each of the lazy-loaded modules that need access to the service. This ensures that there's only one instance of the service across those modules.
In a large application, you observe that the initial load time is quite high. What strategy can you adopt to improve the user's perceived performance?
- Implement lazy loading for modules
- Increase server resources
- Minify and bundle JavaScript files
- Optimize database queries
To improve the user's perceived performance in a large Angular application, you can implement lazy loading for modules. Lazy loading allows you to load only the necessary modules when a user navigates to a specific route, reducing the initial load time.