# Streams & RxDart (Flutter)

> Stream, StreamController, StreamBuilder, rxdart operators, BehaviorSubject, combineLatest

- 24 interview questions
- Senior
- [Interview Questions: Flutter](https://sharpskill.dev/en/technologies/flutter/interview-questions.md)

## 1. What is a Stream in Dart?

**Answer**

A Stream is an asynchronous sequence of data that allows receiving values over time, unlike a Future which returns only a single value. Streams are particularly useful for handling user events, real-time data, or continuous data flows like WebSockets.

## 2. What is the difference between a Single-subscription Stream and a Broadcast Stream?

**Answer**

A Single-subscription Stream can only have one listener at a time and retains events until listened to. A Broadcast Stream allows multiple simultaneous listeners but doesn't retain past events for new subscribers. The choice depends on the use case: file or HTTP for single, UI events for broadcast.

## 3. How to create a simple Stream from a list of values in Dart?

**Answer**

Stream.fromIterable() creates a Stream from an existing collection, emitting each element asynchronously. This method is ideal for converting synchronous data into an asynchronous stream, for example to simulate data or for code uniformity with other data sources.

## 21 more questions available

- Which method should be used to listen to data from a Stream?
- How to convert a Single-subscription Stream to a Broadcast Stream?

Sign up for free: https://sharpskill.dev/en/login

## Other Flutter interview topics

- [Dart Basics](https://sharpskill.dev/en/technologies/flutter/interview-questions/dart-basics.md): 25 questions, Junior
- [Dart Language Essentials](https://sharpskill.dev/en/technologies/flutter/interview-questions/dart-language-essentials.md): 15 questions, Junior
- [Flutter Fundamentals](https://sharpskill.dev/en/technologies/flutter/interview-questions/flutter-fundamentals.md): 18 questions, Junior
- [Widget Lifecycle](https://sharpskill.dev/en/technologies/flutter/interview-questions/widget-lifecycle.md): 20 questions, Junior
- [Local Storage](https://sharpskill.dev/en/technologies/flutter/interview-questions/local-storage.md): 20 questions, Junior
- [Application Lifecycle](https://sharpskill.dev/en/technologies/flutter/interview-questions/app-lifecycle.md): 20 questions, Junior
- [Layouts & Constraints](https://sharpskill.dev/en/technologies/flutter/interview-questions/layouts-constraints.md): 24 questions, Mid-Level
- [ListView & GridView](https://sharpskill.dev/en/technologies/flutter/interview-questions/listview-gridview.md): 25 questions, Mid-Level
- [Navigation & Routing](https://sharpskill.dev/en/technologies/flutter/interview-questions/navigation-routing.md): 22 questions, Mid-Level
- [Basic State Management](https://sharpskill.dev/en/technologies/flutter/interview-questions/state-management-basics.md): 22 questions, Mid-Level
- [Provider Pattern](https://sharpskill.dev/en/technologies/flutter/interview-questions/provider-pattern.md): 18 questions, Mid-Level
- [Networking & HTTP](https://sharpskill.dev/en/technologies/flutter/interview-questions/networking-http.md): 20 questions, Mid-Level
- [JSON Serialization](https://sharpskill.dev/en/technologies/flutter/interview-questions/json-serialization.md): 20 questions, Mid-Level
- [Local Database](https://sharpskill.dev/en/technologies/flutter/interview-questions/local-database.md): 22 questions, Mid-Level
- [Forms & Validation](https://sharpskill.dev/en/technologies/flutter/interview-questions/forms-validation.md): 20 questions, Mid-Level
- [Animations](https://sharpskill.dev/en/technologies/flutter/interview-questions/animations.md): 20 questions, Mid-Level
- [Firebase Integration](https://sharpskill.dev/en/technologies/flutter/interview-questions/firebase-integration.md): 18 questions, Mid-Level
- [Unit Testing](https://sharpskill.dev/en/technologies/flutter/interview-questions/unit-testing.md): 20 questions, Mid-Level
- [Widget Testing](https://sharpskill.dev/en/technologies/flutter/interview-questions/widget-testing.md): 18 questions, Mid-Level
- [Build & Deployment](https://sharpskill.dev/en/technologies/flutter/interview-questions/build-deployment.md): 16 questions, Mid-Level
- [Package Management](https://sharpskill.dev/en/technologies/flutter/interview-questions/package-management.md): 16 questions, Mid-Level
- [Memory & Performance](https://sharpskill.dev/en/technologies/flutter/interview-questions/memory-performance.md): 22 questions, Senior
- [Advanced State Management](https://sharpskill.dev/en/technologies/flutter/interview-questions/advanced-state-management.md): 26 questions, Senior
- [Flutter Design Patterns](https://sharpskill.dev/en/technologies/flutter/interview-questions/flutter-design-patterns.md): 24 questions, Senior
- [Performance Optimization](https://sharpskill.dev/en/technologies/flutter/interview-questions/performance-optimization.md): 26 questions, Senior
- [Platform Channels](https://sharpskill.dev/en/technologies/flutter/interview-questions/platform-channels.md): 20 questions, Senior
- [Custom Painting](https://sharpskill.dev/en/technologies/flutter/interview-questions/custom-painting.md): 22 questions, Senior
- [Flutter Application Architecture](https://sharpskill.dev/en/technologies/flutter/interview-questions/flutter-app-architecture.md): 22 questions, Senior

---

Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack.
HTML version of this page: https://sharpskill.dev/en/technologies/flutter/interview-questions/streams-rxdart