Vyzen Interview Questions and Answers

API to send data to a specific endpoint using any language

• Choose a programming language that supports HTTP requests

• Create a function to send data to the endpoint using HTTP POST method

• Include necessary headers and parameters in the request

• Handle any errors or exceptions that may occur

Services, modules, decorators, and directives are key concepts in Angular development.

• Services: Reusable code that can be injected into components to provide specific functionality.

• Modules: Containers for different parts of an Angular application, including components, services, and directives.

• Decorators: Functions that modify classes or properties in Angular, used for adding metadata or behavior to components.

• Directives: Extend HTML with custom attributes and elements, allow...read more

Lazy loading is a technique used in web development to defer loading non-essential resources until they are needed.

• Lazy loading helps improve page load times by only loading necessary resources initially.

• It is commonly used in Angular applications to load modules, components, or routes on demand.

• Lazy loading can be implemented using Angular's loadChildren property in the routing configuration.

Multicasting is the process of sending data from one source to multiple destinations simultaneously.

• In multicasting, a single sender sends data to a group of receivers at the same time.

• It is commonly used in streaming services where one server sends data to multiple clients.

• Multicasting is more efficient than unicasting (one-to-one communication) when sending data to multiple recipients.

switchMap is an operator in RxJS that projects each source value to an Observable which is merged in the output Observable.

• switchMap is used to switch to a new Observable whenever the source Observable emits a new value.

• It cancels the previous Observable subscription when a new value is emitted.

• Example: source$.pipe(switchMap(value => new Observable(value)))

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 events.

• Operators like map, filter, mergeMap, switchMap, etc., can be used to manipulate and combine streams.

• Example: Using RxJS to handle HTTP requests in Angular applications.