Advanced Angular with RxJS

What is RxJS?

• RxJS is a library for reactive programming.

• RxJS is a new social media platform.

• RxJS is a type of car engine.

• RxJS is a cooking recipe book.

How does RxJS help in Angular development?

• RxJS is not compatible with Angular development

• RxJS only works with synchronous operations in Angular development

• RxJS simplifies handling asynchronous operations, managing streams of data, and complex event handling in Angular development.

• RxJS does not provide any benefits in Angular development

Explain the concept of Observables in RxJS.

• Observables in RxJS represent a stream of data that can be observed over time.

• Observables in RxJS can only emit a single value.

• Observables in RxJS are used for static data only.

• Observables in RxJS are synchronous in nature.

What are Subjects in RxJS?

• Subjects in RxJS are both an Observable and an Observer.

• Subjects in RxJS are exclusively for error handling

• Subjects in RxJS are used for styling web pages

• Subjects in RxJS are only Observables

What is the purpose of operators in RxJS?

• Operators in RxJS are used for creating animations

• Operators in RxJS are primarily used for styling HTML elements

• Operators in RxJS serve the purpose of composing and transforming data streams.

• Operators in RxJS are designed for handling user input

Explain the difference between switchMap and mergeMap in RxJS.

• switchMap and mergeMap are deprecated in RxJS

• switchMap and mergeMap have the same functionality

• switchMap cancels the previous inner observable, mergeMap does not cancel the previous inner observable

• switchMap and mergeMap are interchangeable

How can you handle errors in RxJS Observables?

• Use mergeMap, concatMap, and exhaustMap to handle errors in RxJS Observables.

• Use operators like catchError, retry, and finalize to handle errors in RxJS Observables.

• Use tap, debounceTime, and takeUntil to handle errors in RxJS Observables.

• Use switchMap, map, and filter to handle errors in RxJS Observables.

How can you unsubscribe from an Observable in RxJS?

• subscription.remove()

• subscription.unsubscribe()

• subscription.stop()

• subscription.cancel()

What is the role of schedulers in RxJS?

• Schedulers in RxJS control when a subscription starts and when notifications are delivered.

• Schedulers in RxJS are used for error handling only.

• Schedulers in RxJS are used to control the order of operators in an observable chain.

• Schedulers in RxJS are responsible for managing memory leaks.

How can you create custom operators in RxJS?

• Define custom operators by modifying the RxJS source code

• Use the 'pipe' method to chain existing operators or the 'create' method to define a new operator.

• Custom operators can only be created by RxJS core developers

• Use the 'filter' method to create custom operators