Bajaj Finserv Angular Developer Interview Questions, Process, and Tips

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

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.

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)))

?? 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 if a property is null or undefined.

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.

• Directiv...read more

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.

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.