In Angular, what does a pipe do?
- Create components and services
- Manage state and business logic
- Route navigation and URL management
- Transform and format data
In Angular, a pipe is used to transform and format data in templates. Pipes are built-in or custom functions for modifying how data is displayed in the view.
What is the primary use of "spy" functions in Jasmine?
- To generate random data for testing
- To log console output
- To monitor and track function calls
- To suppress error messages during tests
The primary use of "spy" functions in Jasmine is to monitor and track function calls during tests, enabling you to check how functions are called and with what arguments.
You are optimizing an Angular application and want to ensure that the generated code is as small as possible for faster load times. How can the Ivy Renderer assist in achieving this goal?
- Better component encapsulation
- Enhanced routing performance
- Faster compilation
- Improved tree-shakability
The Ivy Renderer assists in generating smaller code by improving tree-shakability. Tree shaking eliminates unused code during the build process, resulting in a smaller bundle size for faster loading times.
You are tasked with implementing a sign-up form where the password field must match the confirm password field. Which approach would you use to validate this in Angular?
- Built-in Validators
- Custom Validator Function
- Service-based Validation
- Two-way data binding with ngModel
To validate that the password and confirm password fields match, you should use a Custom Validator Function in Angular to implement custom validation logic.
What is the impact of lazy loading on the initial load time of an Angular application?
- It depends on the module
- It has no impact
- It increases initial load
- It reduces initial load
Lazy loading has a positive impact on the initial load time of an Angular application as it reduces the initial load by loading modules on-demand.
You're building an e-commerce application and want to create a nested navigation structure where product categories have sub-categories. How would you design the routing for this scenario using child routes?
- Configure named outlets for sub-categories
- Define child routes within the parent component
- Implement a shared module for navigation
- Use auxiliary outlets for sub-categories
To create nested navigation with sub-categories, you should define child routes within the parent component. This allows for a hierarchical structure in your routing.
What is the purpose of a Form Group in Angular Reactive Forms?
- Define form submission actions
- Define form validation rules
- Group related form controls
- Store form control values
The purpose of a Form Group in Angular Reactive Forms is to group related form controls together. It helps manage and validate a set of related form controls.
Angular Universal generates _____ pages to improve the initial load time of an application.
- Client-side
- Dynamic
- Server-side
- Static
Angular Universal generates server-side pages to improve the initial load time of an application.
When using Dependency Injection in Angular, what is the significance of the @Injectable() decorator?
- It creates a new instance of the service
- It handles routing in Angular
- It injects a service into a component
- It marks a service as singleton
The @Injectable() decorator is used to mark a service as a singleton, meaning that Angular will create a single instance of the service and share it across components that request it.
You need to test an Angular service that makes HTTP requests to an API. You want to ensure your tests are isolated and do not actually make HTTP calls. What approach would you take?
- Creating a Custom Testing Library for HTTP Mocking
- Mocking HTTP Requests using HttpClientTestingModule
- Performing Real HTTP Calls with HttpClient
- Using Angular's TestBed for Service Testing
To isolate tests and avoid making actual HTTP calls, you should use Mocking HTTP Requests using HttpClientTestingModule to mock the HTTP responses.