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Top 10 Angular Interview Questions and Answers
Article by: Manish Methani
Last Updated: January 30, 2024 at 5:19am IST
Welcome to the world of Angular, where dynamic web development meets powerful front-end frameworks! Aspiring to excel in Angular interviews and wondering how to brush up on your knowledge? Look no further. In this article, we've curated a list of the top 10 Angular interview questions with detailed answers. Whether you're a seasoned developer or just diving into the Angular ecosystem, these questions cover essential concepts, best practices, and advanced features. Let's unravel the intricacies of Angular together and prepare you to shine in your next technical interview!
Top 10 Angular Interview Questions and Answers
1. What is Angular?
- Angular is a TypeScript-based open-source framework developed by Google for building web applications.
2. Explain Two-Way Data Binding in Angular.
- Two-Way Data Binding allows automatic synchronization between the model and the view in both directions.
3. Distinguish between ngIf and ngShow in Angular.
- ngIf conditionally adds or removes elements, while ngShow toggles the visibility based on a boolean expression.
4. What is Dependency Injection in Angular?
- Dependency Injection is a design pattern where a class receives its dependencies from an external source rather than creating them itself.
5. Describe the Angular Component Lifecycle Hooks.
- Angular components have lifecycle hooks like ngOnInit, ngOnChanges, and ngOnDestroy that allow developers to respond to changes in the component.
6. What are Angular Services?
- Angular services are singleton objects that encapsulate reusable business logic, shared among components.
7. How does Angular Routing work?
- Angular Routing enables navigation between different components, updating the URL and rendering the corresponding view.
8. Explain Angular Directives.
- Angular directives are markers on a DOM element that tell Angular to run or reference some JavaScript code.
9. What is Lazy Loading in Angular?
- Lazy Loading is a technique where modules or components are loaded on-demand, improving application performance.
10. Differentiate between ngClass and ngStyle in Angular.
- ngClass is used to add or remove CSS classes based on conditions, while ngStyle is used to dynamically apply inline styles.
