How can you simulate user interactions like clicking a button in an Angular test?
- Using ComponentFixture
- Using HttpClient
- Using Jasmine Spy
- Using TestBed
To simulate user interactions, you can use the ComponentFixture to access and interact with a component's DOM elements in your tests.
When you want a component to render content into its template from outside, you use a _____.
- Directive
- Module
- Pipe
- Service
When you want a component to render content into its template from outside, you use a Directive.
What is the main purpose of using directives in Angular applications?
- Create components
- Define routing
- Manipulate the DOM
- Modify data
The main purpose of using directives in Angular applications is to manipulate the DOM by adding, removing, or modifying elements and their behavior. Directives are used to extend HTML with new attributes and elements.
The method used to add a new form control to an existing Form Array is _____ .
- addControl
- addFormControl
- insertControl
- pushControl
The method used to add a new form control to an existing Form Array is addControl.
Components that are designed to be reusable across multiple parts of an application often implement the _____ lifecycle hook to do cleanup work.
- ngDoCheck
- ngOnChanges
- ngOnDestroy
- ngOnInit
Components that are designed to be reusable across multiple parts of an application often implement the ngOnDestroy lifecycle hook to do cleanup work, like unsubscribing from observables.
In the context of Angular Elements, what is the purpose of the createCustomElement() function?
- To create Angular modules
- To create custom HTML elements
- To define custom CSS styles
- To enable Angular routing for elements
In the context of Angular Elements, the createCustomElement() function is used to create custom HTML elements. It takes an Angular component and returns a custom element (Web Component) that can be used in non-Angular environments. This function allows Angular components to be utilized as custom elements with their own HTML tags.
What is a directive in Angular?
- A behavior added to DOM
- A component template
- A module definition
- A route configuration
In Angular, a directive is a behavior added to the Document Object Model (DOM) to extend its functionality. Directives are a way to create reusable components and add dynamic behavior to elements.
When debugging a failing Protractor test, what tool can you use to pause the test execution and inspect the browser's state?
- Browser developer console
- Node.js debugger (e.g., DevTools)
- Protractor's built-in debugger
- WebDriver's built-in debugger (WDB)
When debugging a failing Protractor test, you can use the Node.js debugger, such as Chrome DevTools, to pause the test execution and inspect the browser's state.
To create an Observable that immediately completes without emitting any values, you can use the _____ function.
- create
- empty
- interval
- of
To create an Observable that immediately completes without emitting any values, you can use the empty function.
How does the merge operator behave when combining multiple Observables?
- It combines the latest values from all Observables.
- It emits values from all Observables as they arrive.
- It emits values from the first Observable only.
- It waits for all Observables to complete before emitting values.
The merge operator in RxJS emits values from all Observables as they arrive, without waiting for them to complete.