Angular:
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1) HOW SEND DATA FROM ANGULAR SERVICE TO WEB API
2) how to Use providers in angular and uses.
3) Can we do api call with out service class.
4) Using normal class file can we do call api.
5) Promise vs Observable
6) with out injectable can we do service calls
7) decorators usage in angular.
8) directives in angular.
9) type of Bindings in angular.
10) interceptors and its usage.
11) how to prevent page navigation in middle of insertform angular.
12) canactivate() vs canload().
13) how to pass data in httpget Method to do insert updation.
15) difference between post,put,patch.
16) Use of async pipe in angular.
17) Subject vs behaviorsubject.
18) Use of set keyword in ES6.
19) dom sanitization.
20) pass data from one array to another.
21) absolute ,relative css.
22) what is bootstraping.
23) controll flow componets
--https://codewithpawan.medium.com/angular-interview-questions-from-beginners-to-advance-part-1-7f135fe92de3
What is the significance of View and Encapsulation in Angular?
What is the purpose of a Pure Pipe in Angular?
What is Change Detection in Angular?
What is the purpose of the ng-pristine directive in Angular
What is the role of the ng-content directive in Angular?
What is the significance of the OnPush change detection strategy in Angular?
What is a Standalone component
How do template-driven forms work in Angular?
How do reactive forms work in Angular?
What are some commonly used operators in RxJS?
What is Content Projection in Angular?
How does a Service Worker work in Angular
What is the significance of strictNullChecks in TypeScript
What are Memoization and Currying in functional programming?
What are the differences between blocking and non-blocking code?
What is the difference between Shadow DOM and Virtual DOM?
How can we create composite components in Angular without using @Input and @Output decorators?
Could you provide an overview of Webpack elements in Angular?
What are the differences between switchMap, concatMap, forkJoin, and mergeMap in RxJS?
What is the role of Web Workers and Web Storage in web development?
How does Web Storage work in web development?
What are Semantic Elements in HTML?
What is the significance of a pseudo-class in CSS?
Can you explain how to implement Border Radius in CSS
What are the differences between Promise.all and Promise.settled in JavaScript?
What are Generator Functions in JavaScript?
What are some best practices for Angular development?
How does dependency injection work in Angular
---https://www.scholarhat.com/tutorial/angular/angular-interview-questions-and-answers
What are the different ways to pass data between components
What are services and their benefits in Angular?
Describe best practices for using services in Angular
What are the different types of routing in Angular?
What do you understand by impure pipes?
Your Angular application is experiencing slow loading times. You need to identify the bottleneck and optimize performance. How would you approach this?
What is the purpose of the Signal API introduced in Angular 14+?
What is Ivy in Angular
What are Angular Guards?
Explain dynamic components in Angular?
forkJoin
What is transpiling in Angular
--https://github.com/sudheerj/angular-interview-questions
How is Dependency Hierarchy formed?
How do you add web workers in your application?
what is signal?
Here are some advanced Angular interview questions suitable for a 10-year experienced candidate. These questions cover a range of topics that test deep knowledge of Angular and best practices, performance optimization, and architecture design.
1. Architecture and Design Patterns
Can you explain how Angular's modularity helps in managing large-scale applications?
Discuss the structure of Angular modules, how they help organize features, and how lazy loading and feature modules improve application scalability.
How do you manage state in large Angular applications?
Talk about approaches such as NgRx, BehaviorSubject, Services, or other state management solutions. Provide use cases and performance considerations.
What is the role of @Injectable decorator and how is it used in Angular services?
Discuss how dependency injection works in Angular and the purpose of using providedIn with the @Injectable decorator.
What is the Singleton pattern in Angular services, and how does Angular use it?
Discuss how Angular uses DI (Dependency Injection) to create a singleton instance of services.
2. Advanced Performance Optimizations
How do you handle change detection strategy for large-scale applications?
Discuss the use of ChangeDetectionStrategy.OnPush, how it optimizes performance by checking for changes only when inputs change, and strategies like detaching change detection for certain components.
Can you explain how Angular's Ahead-of-Time (AOT) compilation helps in performance optimization?
Compare AOT and Just-in-Time (JIT) compilation, emphasizing performance improvements, faster rendering, and smaller bundle sizes with AOT.
What is lazy loading, and how do you implement it in Angular?
Explain how lazy loading of feature modules works and its benefits in large applications. Discuss routing and module separation in the context of lazy loading.
How do you deal with memory leaks in Angular applications?
Talk about the use of ngOnDestroy lifecycle hooks, proper unsubscription techniques with RxJS, and handling event listeners and observables to avoid memory leaks.
3. RxJS and Reactive Programming
What are the key differences between Observable, Subject, and BehaviorSubject in RxJS?
Compare their behaviors, use cases, and how they are used in Angular for managing asynchronous data flows.
Can you explain the concept of "debouncing" and its use case in Angular?
Discuss how debouncing is implemented using RxJS operators like debounceTime and distinctUntilChanged to optimize user input handling.
How does the async pipe work with observables in Angular templates?
Explain how the async pipe automatically subscribes and unsubscribes from observables, and how it simplifies template binding.
4. Advanced Angular Concepts
What are Angular decorators, and how are they used in Angular?
Discuss decorators like @Component, @NgModule, @Injectable, @Directive, and @Input. Explain how decorators are used to define metadata for Angular classes.
What is Angular Universal and how does it relate to server-side rendering (SSR)?
Explain the purpose of Angular Universal, its benefits for SEO and performance, and how SSR differs from client-side rendering.
Can you explain the differences between Angular Universal and Static Site Generation (SSG)?
Discuss how SSR (Server-Side Rendering) pre-renders pages on the server, while SSG (Static Site Generation) generates static HTML at build time.
What are Angular guards, and how do they differ from interceptors in routing?
Discuss route guards like CanActivate, CanDeactivate, Resolve, and CanLoad, and their use cases. Contrast guards with HTTP interceptors in managing request/response transformations.
What is the purpose of the ngOnInit and ngAfterViewInit lifecycle hooks, and how do they differ?
Explain their use in component lifecycle management and when to use each one in a complex component initialization process.
5. Testing and Debugging
How do you approach unit testing in Angular applications?
Discuss tools like Jasmine, Karma, and TestBed. Provide examples of testing Angular services, components, and directives, including mock dependencies and asynchronous tests.
How would you mock an HTTP service in unit tests?
Explain how to mock HTTP requests using Angular’s HttpClientTestingModule and HttpTestingController to test HTTP-related logic in services.
What are the best practices for debugging Angular applications?
Discuss techniques such as using Angular DevTools, debugging RxJS observables, and leveraging browser developer tools for performance profiling.
6. Dependency Injection and Services
Can you explain Angular's dependency injection (DI) mechanism and its scope?
Discuss how DI works in Angular, the difference between root, module, and component-level providers, and how services are injected into components.
What is the difference between providedIn: 'root' and providedIn: 'any' in services?
Explain the difference in terms of instance creation and scope in Angular modules and components.
7. Angular Security and Best Practices
What are Angular's security mechanisms, and how do they protect against XSS and CSRF attacks?
Discuss Angular's built-in sanitization mechanisms and how the framework automatically escapes untrusted content to prevent XSS vulnerabilities.
How do you implement authentication and authorization in Angular applications?
Talk about JWT tokens, OAuth, guards, and how to manage protected routes and authorization strategies.
What is content security policy (CSP) in the context of Angular applications?
Discuss how Angular works with CSP headers to ensure the application doesn't allow unsafe inline scripts, mitigating XSS attacks.
8. Angular CLI and Build Process
How do you optimize the build process in Angular?
Explain Angular CLI commands and configurations such as lazy loading, AOT compilation, production builds, tree shaking, service workers, and build optimization techniques.
What is tree shaking and how does it improve the performance of Angular applications?
Discuss tree shaking in the context of unused code elimination during the build process and its impact on bundle size.
9. New Features in Angular (Latest Version)
What are some of the new features introduced in the latest version of Angular?
Discuss new features or changes in the most recent Angular release, such as Angular 14 or 15, including improvements in type safety, standalone components, and ngModules.
What is the role of Standalone Components in Angular?
Explain how Standalone Components provide a new way of structuring Angular applications without requiring modules, simplifying development for small-to-medium applications.
Summary:
These questions are designed to assess your depth of experience with Angular, covering both technical skills and architectural knowledge. Expect to demonstrate your understanding of advanced topics such as state management, RxJS, dependency injection, performance optimization, and testing practices. Additionally, be prepared to explain how you've tackled challenges in large-scale Angular applications and your experience with Angular's ecosystem and tooling.
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