Angular Interview Questions For Senior Developer
Advanced Angular Interview Questions for Senior Developers
Angular Interview Questions For Senior Developer
Angular interview questions for senior developers often focus on advanced concepts such as observables, authentication, lazy loading, performance optimization, state management using NgRx, dependency injection, and unit testing. Interviewers may also inquire about your experience with Angular best practices, modular design, advanced routing strategies, and handling internationalization and localization. Additionally, expect questions about your problem-solving skills, ability to work with a large codebase, performance tuning, and experience collaborating with backend developers. To succeed in an Angular interview for a senior developer position, be prepared to discuss your hands-on experience and demonstrate a deep understanding of Angular's architecture and key features.
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1 - Explain the difference between AngularJS and Angular: AngularJS (Angular 1.x) is the first version of Angular developed by Google, while Angular (Angular 2 and above) is a complete rewrite of AngularJS that offers improved performance and better support for modern web development practices.
2) Describe the Angular component lifecycle hooks: Angular components have lifecycle hooks such as ngOnInit, ngOnDestroy, ngOnChanges, etc., which allow developers to perform actions at specific points during the component's lifecycle, like initializing data, cleaning up resources, or reacting to changes in input properties.
3) What is dependency injection in Angular? Dependency injection is a design pattern in which a class's dependencies are provided externally rather than created within the class itself. In Angular, dependencies are injected into components, services, and other classes using the built in dependency injection system provided by the framework.
4) How does routing work in Angular? Angular provides a powerful routing module that allows developers to define routes, configure navigation paths, and load components based on the current URL in the browser. Routing in Angular helps create a single page application experience by dynamically changing the content displayed to users without reloading the entire page.
5) What are services in Angular? Services are reusable pieces of code that provide specific functionality or data to components in an Angular application. Services help in keeping code modular, promoting separation of concerns, and facilitating code reuse across different parts of an application.
6) Explain the concept of observables in Angular: Observables are a powerful tool in Angular for handling asynchronous operations and data streams. They are used extensively in Angular's HTTP client, forms, and event handling to manage and react to data over time, providing a clean and flexible way to work with asynchronous data in applications.
7) How can you optimize the performance of an Angular application? Performance optimization in Angular involves techniques such as lazy loading modules, tree shaking to remove unused code, optimizing bundle sizes, utilizing change detection strategies like OnPush, and implementing efficient data binding techniques to minimize rendering and improve overall application speed.
8) What is AOT (Ahead of Time) compilation in Angular? AOT compilation is a process in which Angular compiles application code during the build phase, rather than at runtime in the browser. This method improves application performance by detecting and eliminating errors early, reducing the size of bundles, and making the application load faster for users.
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