Angular components, modules, services, dependency injection, templates, directives, RxJS observables, routing and signals.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- What is an Angular component?
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A reusable building block combining a template, class, and metadata decorator- What decorator marks a class as an Angular component?
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@Component- In @Component, what property specifies the HTML template?
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templateUrl or template- In @Component, what property specifies CSS styles?
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styleUrls or styles- What is component lifecycle in Angular?
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A series of hooks called at key moments like init, change detection, and destroy- What is an Angular module?
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A container for components, services, directives, and pipes grouped by functionality- What decorator marks a class as an Angular module?
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@NgModule- Name the four main properties of @NgModule
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declarations, imports, exports, providers- What is an Angular service?
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A class providing functionality or data that can be shared across multiple components- What decorator marks a class as a service?
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@Injectable- What does the providedIn property in @Injectable specify?
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Where the service should be registered (e.g., root, a specific module)- Why use services in Angular?
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To share logic and data across components and follow single-responsibility principle- What is dependency injection?
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A design pattern where a class receives its dependencies from external sources- How do you inject a service into a component?
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Add it as a constructor parameter with the appropriate type- What is the purpose of the Injector in Angular?
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To create instances of services and automatically resolve their dependencies
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