Structure your answer by grouping Angular's features into logical layers: architecture (modules, components, templates), core mechanisms (dependency injection, change detection), data flow (observables, routing), and forms (template-driven vs reactive). For each feature, briefly explain what it is and why it matters, then highlight trade-offs or real-world implications to show depth.
Pro tip: Tie each feature to a practical scenario or trade-off—e.g., when to use reactive forms over template-driven, or how OnPush change detection improves performance—to demonstrate hands-on experience and architectural thinking.
Briefly state that Angular is a full-featured, opinionated framework and that these features work together to build scalable SPAs. This sets context and shows you understand the ecosystem.
Explain that modules organize the app into cohesive blocks, components are the building blocks with logic and views, and templates define the UI with Angular-specific syntax. Mention that components are declared in modules and use templates to render data.
Describe dependency injection as a way to provide dependencies to classes, promoting modularity and testability. Then explain change detection as the process that updates the view when data changes, and mention strategies like Default and OnPush.
Highlight observables as a powerful way to handle async data streams, often used with HTTP and reactive forms. Then cover routing as the mechanism for navigation between views, including route guards and lazy loading.
Contrast template-driven forms (simpler, two-way binding, suitable for basic scenarios) with reactive forms (more control, testable, suitable for complex validation). Conclude by emphasizing how these features collectively enable robust application development.
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