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Angular Interview Questions And Answers English


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Angular Interview Questions and Answers - English


Angular Interview Questions and Answers - English

Author: Navneet Singh

language: en

Publisher: Navneet Singh

Release Date:


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Here are some common Angular interview questions along with their answers: What is Angular? Angular is a TypeScript-based open-source web application framework developed and maintained by Google. It is used for building dynamic, single-page web applications (SPAs) and is popular for its features like data binding, dependency injection, and modular design. What are the key features of Angular? Key features of Angular include: Two-way data binding Dependency injection Directives Components Services Routing Forms HTTP client Modular architecture What is the difference between AngularJS and Angular? AngularJS (Angular 1.x) is an older version of the framework written in JavaScript, while Angular (Angular 2 and above) is a complete rewrite of AngularJS using TypeScript. Angular offers better performance, modularity, and tooling compared to AngularJS. Angular introduces features like components, modules, and improved dependency injection that were not present in AngularJS. What are components in Angular? Components are the building blocks of an Angular application. They are TypeScript classes with an associated HTML template and styles. Each component encapsulates a part of the user interface and behaviour of the application. What is Angular CLI? Angular CLI (Command Line Interface) is a command-line tool used for scaffolding, building, and managing Angular applications. It provides commands for generating components, services, modules, and other artifacts, as well as for running development servers and building production bundles. What is lazy loading in Angular? Lazy loading is a technique in Angular where modules are loaded asynchronously when needed, rather than loading all modules at once when the application starts. This improves application startup time and reduces initial bundle size. Explain Angular directives. Directives in Angular are markers on a DOM element that tell Angular's HTML compiler (part of the framework) to attach a specified behaviour to that DOM element or transform the DOM element and its children. Angular provides built-in directives like ngIf, ngFor, ngModel, etc., and allows developers to create custom directives as well. What is dependency injection in Angular? Dependency injection (DI) is a design pattern used in Angular to inject dependencies (services or objects) into components or other services. DI allows for better modularity, testability, and maintainability by decoupling components and their dependencies. Explain Angular routing. Angular routing is a mechanism for navigating between different components in an Angular application. It allows developers to define routes with corresponding components and templates, set up navigation paths, and handle navigation events. Angular's router also supports features like lazy loading, route guards, and parameterized routes. How do you handle HTTP requests in Angular? Angular provides an HTTP Client module for making HTTP requests to backend servers. Developers can use methods like get(), post(), put(), delete(), etc., provided by the HTTP Client service to perform CRUD operations and handle responses using Observables. These questions cover a range of topics commonly discussed in Angular interviews, from basic concepts to more advanced features and best practices.

500 AngularJS Interview Questions and Answers


500 AngularJS Interview Questions and Answers

Author: Vamsee Puligadda

language: en

Publisher: Vamsee Puligadda

Release Date:


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Get that job, you aspire for! Want to switch to that high paying job? Or are you already been preparing hard to give interview the next weekend? Do you know how many people get rejected in interviews by preparing only concepts but not focusing on actually which questions will be asked in the interview? Don't be that person this time. This is the most comprehensive Angular JS interview questions book that you can ever find out. It contains: 1000 most frequently asked and important Angular JS interview questions and answers Wide range of questions which cover not only basics in Angular JS but also most advanced and complex questions which will help freshers, experienced professionals, senior developers, testers to crack their interviews.

Front-End Developer Interview Questions and Answers - English


Front-End Developer Interview Questions and Answers - English

Author: Navneet Singh

language: en

Publisher: Navneet Singh

Release Date:


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Preparing for a front-end developer interview involves mastering a range of topics from HTML, CSS, JavaScript, frameworks like React or Angular, to understanding web performance and accessibility. Here are some common interview questions and answers to help you get ready: HTML Questions What is the difference between

and ? Answer:
is a block-level element used for grouping larger sections of content, while is an inline element used for styling small portions of text or other inline elements. What is the purpose of the data- attribute in HTML? Answer: The data- attribute is used to store custom data private to the page or application. It can be accessed via JavaScript for manipulation or retrieval without affecting the DOM structure. CSS Questions What are the different types of CSS selectors? Answer: There are several types of CSS selectors, including: Element selectors: e.g., p { ... } Class selectors: e.g., .class-name { ... } ID selectors: e.g., #id-name { ... } Attribute selectors: e.g., [type="text"] { ... } Pseudo-class selectors: e.g., a:hover { ... } Pseudo-element selectors: e.g., p::first-line { ... } Explain the box model in CSS. Answer: The CSS box model describes how the elements on a web page are structured. It consists of: Content: The actual content of the box, where text and images appear. Padding: Clears an area around the content; it's transparent. Border: A border that goes around the padding (and content). Margin: Clears an area outside the border; it's transparent. JavaScript Questions What is the difference between var, let, and const? Answer: var: Function-scoped and can be re-declared and updated. let: Block-scoped and can be updated but not re-declared within the same scope. const: Block-scoped and cannot be updated or re-declared. Explain event delegation in JavaScript. Answer: Event delegation is a technique where a single event listener is added to a parent element to manage events for multiple child elements. This is efficient because it reduces the number of event listeners attached to the DOM. Framework/Library Questions What are the key features of React? Answer: JSX: A syntax extension that allows mixing HTML with JavaScript. Virtual DOM: Improves performance by minimizing direct DOM manipulations. Components: Building blocks of a React application that encapsulate the rendering logic. State and Props: State for dynamic data management within components, and props for passing data between components. What is the difference between Angular and React? Answer: Angular: A full-fledged MVC framework developed by Google. It uses TypeScript and has a steep learning curve with features like dependency injection, two-way data binding, and a comprehensive CLI. React: A library developed by Facebook for building UI components. It uses JavaScript (or TypeScript) and is focused on the view layer, promoting a unidirectional data flow and utilizing a virtual DOM for performance. Web Performance and Accessibility What are some techniques to improve web performance? Answer: Minification and compression of CSS and JavaScript files. Using a Content Delivery Network (CDN). Lazy loading of images and other media. Optimizing images and using responsive images. Reducing the number of HTTP requests. Implementing caching strategies. What are ARIA roles and how do they improve accessibility? Answer: ARIA (Accessible Rich Internet Applications) roles provide additional information to screen readers about the purpose of elements. For example, role="button" indicates that an element functions as a button, improving the accessibility experience for users who rely on assistive technologies. Miscellaneous Questions What is a CSS preprocessor and why would you use one? Answer: A CSS preprocessor extends CSS with variables, nested rules, mixins, functions, and more. Examples include SASS and LESS. They help write more maintainable and scalable CSS. What are some common methods for handling asynchronous operations in JavaScript? Answer: Callbacks: Functions passed as arguments to be executed after the completion of an asynchronous operation. Promises: Objects representing the eventual completion (or failure) of an asynchronous operation and its resulting value. Async/Await: Syntax sugar on top of promises that allows writing asynchronous code in a synchronous manner. Practical Questions How do you ensure cross-browser compatibility for a website? Answer: Use CSS resets/normalizes. Test on multiple browsers and devices regularly. Utilize feature detection libraries like Modernizr. Write clean, standards-compliant code. Use vendor prefixes where necessary. Avoid browser-specific hacks. Describe how you would create a responsive design. Answer: Use a fluid grid layout. Utilize flexible images and media queries. Adopt a mobile-first approach, designing for smaller screens first and then scaling up. Implement responsive typography and spacing. Conclusion Preparing for a front-end developer interview requires understanding both theoretical concepts and practical implementation. Practicing these questions will help you articulate your knowledge and demonstrate your skills effectively.