Deriv Flutter Developer Interview Questions and Answers

Q1. Bloc state management
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Q2. Api calling in flutter
Ans. 
Api calling in Flutter involves making HTTP requests to fetch data from a server.
• Use packages like http or dio to make API calls in Flutter

• Handle asynchronous operations using Future and async/await

• Parse JSON data using json.decode() method

• Implement error handling for network requests
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Q1. Flutter and dart related
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Company ask me logical question

Q1. About your self
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Q2. Your Current CTC
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Q1. What is Flutter
Ans. 
Flutter is a UI toolkit from Google for building natively compiled applications for mobile, web, and desktop from a single codebase.
• Developed by Google

• Uses Dart programming language

• Allows for building cross-platform applications with a single codebase

• Hot reload feature for quick development iterations
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Q2. Why select Flutter
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Company give me one UI and give 3 API and I make that UI and Retrieve API data

Q1. React Life cycle
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Q2. What React hooks have you utilized in your projects?
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Q3. What is Redux, and what are the differences between Redux and Context?
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Q4. What is the difference between visibility: hidden and display: none in CSS?
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Q5. What are JavaScript closures, the temporal dead zone (TDZ), hoisting, and the JavaScript engine?
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Identify the duplicate character in the string.

Q1. Mostly js questions, not so many of angular or react.
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Q2. Like fizbuzz or things like that.
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Q1. JavaScript Related Questions
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Q2. ReactJs Related Questions
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Q1. Reactjs Use Effects and UseRef
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Q2. JavaScript Closures,Map,CallBack
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Coding a frontend UI from provided image. And creating a fucntional star rating system

Q1. Designing a Component API in React using Typescript.
Ans. 
Designing a Component API in React using Typescript involves defining props, state, and methods for the component.
• Define the props interface to specify the expected input data for the component

• Use typescript types to ensure type safety and prevent runtime errors

• Define the state interface to manage the internal state of the component

• Implement methods to handle user interactions and component logic

• Document the component
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Q2. Create a function that can clear all the timer ids at once.
Ans. 
Function to clear all timer ids at once
• Create an array to store all timer ids

• Iterate through the array and clear each timer id using clearTimeout() function
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Q1. What is event bubbling
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Q2. What is TDD and why TDD
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