Red Bixbite Solutions Junior Angular Developer Interview Questions and Answers

Using services or @Input/@Output decorators to share data between components

• Use services to create a shared data service that can be injected into multiple components

• Use @Input decorator to pass data from parent to child component

• Use @Output decorator with EventEmitter to emit events and pass data from child to parent component

Http request in Angular is used to fetch data from a server or API.

• Use HttpClient module to make HTTP requests in Angular

• Subscribe to the Observable returned by the HTTP request to get the data

• Handle errors using catchError operator

• Set headers, query parameters, and request body as needed

SVG is a vector-based graphics format while Canvas is a bitmap-based graphics format.

• SVG uses XML to define graphics and is resolution-independent.

• SVG elements can be styled with CSS and manipulated with JavaScript.

• Canvas is a pixel-based grid where graphics are drawn programmatically.

• Canvas is more suitable for complex animations and real-time rendering.

• Canvas has better performance for rendering large amounts of data

Routing in Angular allows for navigation between different components and views within an application.

• Angular's router module provides a way to define routes and their corresponding components.

• Routes can be configured with path, component, and other properties.

• RouterOutlet is used to display the component associated with the current route.

• RouterLink is used to navigate to different routes.

• Child routes can be defined to...read more

Developed a web application for managing inventory and sales for a retail store.

• Used Angular framework to create a responsive and user-friendly interface.

• Implemented features for adding, updating, and deleting products in the inventory.

• Integrated with backend APIs to fetch real-time sales data and generate reports.

• Utilized Angular Material for designing consistent UI components.

Angular is a popular front-end framework for building web applications. SPA stands for Single Page Application.

• Angular is a front-end framework developed by Google for building dynamic web applications.

• It uses TypeScript for building applications with components, services, and modules.

• SPA is a web application that loads a single HTML page and dynamically updates the content as the user interacts with the app.

• SPA provid...read more

Lazy loading is a technique in web development where resources are loaded only when needed, improving performance.

• Lazy loading helps reduce initial load time by loading resources on demand

• It is commonly used in Angular for loading modules, components, or routes asynchronously

• Lazy loading can improve user experience by speeding up page load times

RxJS is a library for reactive programming using Observables to handle asynchronous data streams.

• RxJS stands for Reactive Extensions for JavaScript.

• It allows you to work with asynchronous data streams and handle events.

• Operators like map, filter, and mergeMap are used to manipulate and combine streams.

• Subscriptions are used to listen to and react to changes in the data streams.

• Example: Using RxJS to make HTTP requests

?? is the nullish coalescing operator, while ? is the optional chaining operator in Angular.

• ?? is used to provide a default value when a variable is null or undefined.

• ? is used to safely access nested properties of an object without causing errors.

• Example: const name = person?.name; // safe access to 'name' property of 'person' object