You have a directive that changes the background color of an element when the user hovers over it. How would you test this directive to ensure that it behaves correctly?
- Use end-to-end tests
- Use linters
- Use unit tests
- Use visual regression tests
To test this directive, you should use unit tests. Unit tests are suitable for testing the individual behavior of the directive and verifying that it changes the background color on hover as expected.
Which RxJS operator can be used to combine multiple Observables into a single Observable?
- concat
- filter
- merge
- pluck
The merge operator in RxJS is used to combine multiple Observables into a single Observable, emitting values from all source Observables concurrently.
Angular Elements encapsulates the complexity of Angular's _____, making it more approachable for different setups.
- Application Logic
- Component Tree
- Core Modules
- Dependency Injection
Angular Elements encapsulates the complexity of Angular's Dependency Injection, making it more approachable for different setups and simplifying the integration of Angular components into non-Angular applications.
What challenges might you encounter when using Angular Universal for Server-Side Rendering?
- All of the above
- Dealing with client-side routing on the server
- Handling session and cookies correctly
- Managing third-party libraries not designed for SSR
When using Angular Universal for Server-Side Rendering, you may encounter several challenges, including all of the above. It involves handling sessions and cookies, managing client-side routing, and addressing third-party library issues.
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.
In Angular, what is the primary purpose of a component's class?
- Define component behavior
- Define routing
- Handle user input
- Store metadata
The primary purpose of a component's class in Angular is to define component behavior, including properties, methods, and event handlers.