Architecture & Best Practices Interview Questions
Comprehensive architecture & best practices interview questions and answers for Angular. Prepare for your next job interview with expert guidance.
Questions Overview
1. What are the key principles of Angular architecture?
Basic2. How do you structure a large Angular application?
Advanced3. What is the role of Core Module in Angular?
Moderate4. What are feature modules and their importance?
Moderate5. How do you implement smart and presentational components?
Moderate6. What is the Shared Module pattern?
Basic7. How do you implement scalable state management?
Advanced8. What are the best practices for service architecture?
Moderate9. How do you implement domain-driven design in Angular?
Advanced10. What are the patterns for component communication?
Moderate11. How do you implement application-wide error handling?
Advanced12. What are the best practices for API integration?
Moderate13. How do you implement micro-frontend architecture?
Advanced14. What are the patterns for form management?
Moderate15. How do you implement security best practices?
Advanced16. What are the patterns for route management?
Moderate17. How do you implement performance optimization?
Advanced18. What are the best practices for testing architecture?
Moderate19. How do you implement internationalization architecture?
Advanced20. What are the patterns for authentication/authorization?
Advanced21. How do you implement reusable component libraries?
Advanced22. What are the best practices for dependency management?
Moderate23. How do you implement logging architecture?
Moderate24. What are the patterns for offline support?
Advanced25. How do you implement CI/CD best practices?
Advanced26. What are the best practices for code organization?
Basic27. How do you implement accessibility best practices?
Moderate28. What are the patterns for real-time updates?
Advanced29. How do you implement progressive enhancement?
Advanced1. What are the key principles of Angular architecture?
BasicKey principles include: Modularity (feature modules), Component-based architecture, Dependency Injection, Separation of Concerns, Single Responsibility. Focus on maintainability, scalability, and reusability. Consider proper layer separation.
2. How do you structure a large Angular application?
AdvancedStructure using feature modules, core/shared modules, lazy loading. Implement proper folder organization, naming conventions. Consider scalability, maintainability. Follow LIFT principle (Locatable, Isolated, Focused, Testable).
3. What is the role of Core Module in Angular?
ModerateCore Module contains singleton services, one-time imported components. Houses app-wide services, guards, interceptors. Should be imported only in AppModule. Ensures single instance of services.
4. What are feature modules and their importance?
ModerateFeature modules organize related components, services, pipes. Support lazy loading, encapsulation. Improve maintainability, testing. Consider domain boundaries, functionality grouping.
5. How do you implement smart and presentational components?
ModerateSmart components handle business logic, data. Presentational components focus on UI, receive data via inputs. Promotes reusability, separation of concerns. Consider component responsibility division.
6. What is the Shared Module pattern?
BasicShared Module contains common components, pipes, directives. Imported by feature modules. Avoids code duplication, promotes reuse. Consider module size, import frequency.
7. How do you implement scalable state management?
AdvancedState management through services (small apps) or NgRx/other state libraries (large apps). Consider data flow, state access patterns. Implement proper immutability, change detection strategies.
8. What are the best practices for service architecture?
ModerateService architecture: proper separation, single responsibility, injectable services. Consider service scope, dependency injection. Implement proper error handling, logging.
9. How do you implement domain-driven design in Angular?
AdvancedDDD through feature modules, domain services, entities. Organize by business domains. Consider bounded contexts, domain logic separation. Important for complex business applications.
10. What are the patterns for component communication?
ModerateCommunication patterns: Input/Output, Services, State Management, Event Bus. Choose based on component relationship, data flow needs. Consider component coupling, maintainability.
11. How do you implement application-wide error handling?
AdvancedError handling through ErrorHandler service, HTTP interceptors. Implement centralized error logging, user feedback. Consider different error types, recovery strategies.
12. What are the best practices for API integration?
ModerateAPI integration: service layer abstraction, typed interfaces, proper error handling. Implement caching, retry strategies. Consider API versioning, security.
13. How do you implement micro-frontend architecture?
AdvancedMicro-frontends through Module Federation, Custom Elements. Handle inter-app communication, shared dependencies. Consider deployment strategy, team organization.
14. What are the patterns for form management?
ModerateForm patterns: Template-driven vs Reactive forms, form builders, validation services. Consider form complexity, validation requirements. Implement proper error handling, user feedback.
15. How do you implement security best practices?
AdvancedSecurity practices: XSS prevention, CSRF protection, secure authentication. Implement proper authorization, input validation. Consider security headers, secure configuration.
16. What are the patterns for route management?
ModerateRoute patterns: feature-based routing, guard protection, resolvers. Implement proper navigation, data preloading. Consider lazy loading, route parameters.
17. How do you implement performance optimization?
AdvancedPerformance optimization: lazy loading, change detection strategy, bundle optimization. Implement proper caching, virtual scrolling. Consider loading strategies, performance metrics.
18. What are the best practices for testing architecture?
ModerateTesting architecture: unit tests, integration tests, e2e tests. Implement proper test organization, coverage. Consider test pyramid, testing strategies.
19. How do you implement internationalization architecture?
Advancedi18n architecture: translation files, language services, locale handling. Implement proper text extraction, runtime translation. Consider cultural differences, formatting.
20. What are the patterns for authentication/authorization?
AdvancedAuth patterns: JWT handling, guard protection, role-based access. Implement secure token storage, refresh mechanisms. Consider session management, security.
21. How do you implement reusable component libraries?
AdvancedComponent libraries: shared styles, documentation, versioning. Implement proper encapsulation, API design. Consider reusability, maintainability.
22. What are the best practices for dependency management?
ModerateDependency management: proper versioning, package organization, update strategy. Implement dependency injection, module organization. Consider bundle size, compatibility.
23. How do you implement logging architecture?
ModerateLogging architecture: centralized logging, error tracking, monitoring. Implement proper log levels, storage strategy. Consider privacy, performance impact.
24. What are the patterns for offline support?
AdvancedOffline patterns: service workers, local storage, sync mechanisms. Implement proper caching, data persistence. Consider offline-first approach, sync conflicts.
25. How do you implement CI/CD best practices?
AdvancedCI/CD practices: automated testing, build optimization, deployment strategy. Implement proper environment configuration, versioning. Consider deployment automation, monitoring.
26. What are the best practices for code organization?
BasicCode organization: proper folder structure, naming conventions, module organization. Implement feature-based structure, shared code. Consider scalability, maintainability.
27. How do you implement accessibility best practices?
ModerateAccessibility practices: ARIA labels, keyboard navigation, screen reader support. Implement proper semantic markup, focus management. Consider WCAG guidelines, testing.
28. What are the patterns for real-time updates?
AdvancedReal-time patterns: WebSocket integration, polling strategies, state updates. Implement proper connection management, error handling. Consider scalability, performance.
29. How do you implement progressive enhancement?
AdvancedProgressive enhancement: feature detection, fallback strategies, graceful degradation. Implement proper browser support, feature flags. Consider user experience, compatibility.