To enable strict mode for a new Angular application, ensuring stricter type-checking and other stricter checks, you would use the ng new command with the ______ flag.
- #NAME?
- #NAME?
- #NAME?
- strict
To enable strict mode for a new Angular application, which enforces stricter type-checking and other stricter checks, you would use the --strict flag with the ng new command. This flag sets up the project with more rigorous TypeScript checks and helps catch errors at compile-time.
You are tasked with creating a dynamic dashboard where users can add or remove widgets based on their preference. Which Angular feature would you leverage to dynamically render these widgets?
- ngIf structural directive
- @ViewChild decorator
- ngOnChanges lifecycle hook
- ngFor structural directive
To dynamically render widgets based on user preferences, you would leverage the ngIf structural directive in Angular. This directive conditionally renders or removes elements based on a given expression. It's ideal for showing or hiding widgets as needed without re-rendering the entire component. The other options, such as @ViewChild, ngOnChanges, and ngFor, have different use cases and are not suitable for this specific scenario.
You have a multi-step form in your Angular application. At any step, if the user tries to navigate away without saving, you want to alert them. Which Route Guard will best serve this purpose?
- CanActivate
- CanActivateChild
- CanDeactivate
- Resolve
The CanDeactivate route guard is used for scenarios where you want to prompt the user with a confirmation message before navigating away from a route. It's commonly used for guarding forms to prevent users from losing unsaved data.
What is the primary role of Effects in NgRx?
- Defining Actions
- Managing Side Effects
- Reducing State
- Rendering Views
The primary role of "Effects" in NgRx is to manage side effects in your application. Side effects can include making HTTP requests, interacting with external services, and other asynchronous operations. Effects help keep your reducers pure by handling these tasks separately.
To update the value of a specific FormControl without emitting an event or re-evaluating the validation status, you would use the ______ method with specific configuration.
- patchValue
- setFormControlValue
- setValueWithConfig
- updateControlValue
To update the value of a specific FormControl without emitting an event or re-evaluating the validation status, you would use the patchValue method with specific configuration. This method allows you to update only the specified controls within a FormGroup without affecting the entire form's state or triggering any events.
When using Lazy Loading, which property in the Angular routing configuration is used to point to the lazily loaded module?
- importModule
- lazyModule
- loadChildren
- loadModule
When implementing Lazy Loading in Angular, the loadChildren property in the routing configuration is used to specify the path to the lazily loaded module. This allows Angular to load the module on-demand when the associated route is visited, improving initial page load times.
The @Output() decorator is used to emit custom ________ from a component.
- input events
- methods
- output events
- properties
The @Output() decorator is used to emit custom output events from an Angular component. These events allow a component to communicate with its parent or containing components. By emitting custom events, a child component can notify its parent about specific actions or changes, enabling parent-child communication in Angular applications.
Which state management solution is based on the concept of stores and queries?
- Akita
- MobX
- Redux
- RxJS
Akita is based on the concept of stores and queries. In Akita, stores hold the application state, and queries are used to retrieve and manipulate data from these stores. This pattern makes state management in Akita efficient and intuitive.
In which scenario would you use the updateOn option with a value of 'blur' for a FormControl?
- To update the control only on user focus.
- To update the control only on user input.
- To update the control immediately after any change.
- To update the control on a custom event trigger.
You would use the updateOn option with a value of 'blur' for a FormControl when you want the control to update its value and trigger validation only when the user focuses on it (on blur). This can be helpful to provide a more user-friendly experience by not showing immediate validation errors as the user types. Options like 'user input' or 'immediately after any change' would lead to different behaviors not associated with 'blur.'
A client asks you to highlight the currently active page link in the navigation menu. How would you achieve this in Angular?
- By using the routerLinkActive directive and applying it to the navigation menu items with a CSS class.
- By using JavaScript to detect the active route and apply a CSS class to the corresponding navigation menu item.
- By manually updating the active page link in the navigation component whenever a route changes.
- By creating a custom Angular directive to handle active link highlighting.
To highlight the currently active page link in the navigation menu in Angular, you should use the routerLinkActive directive. This directive is applied to the navigation menu items and automatically adds a CSS class when the corresponding route is active. The other options are either incorrect or involve more manual and error-prone approaches.