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      React Native Developer Interview

      3 Nov 2022
      Anonymous interview candidate
      New Delhi
      No offer
      Positive experience
      Difficult interview

      Application

      I applied through a recruiter. The process took 2 weeks. I interviewed at Techwondoe (New Delhi) in Oct 2022

      Interview

      Assignment Task (Round 1). A sound player app where sound control needs to be implemented. Sound files needed to be cached from server to local when the user opens for the first time. Next time onwards, the files should be picked from local storage. When the file is downloading (getting cached locally), a circular progress bar should show up as in the images. When downloaded the sound should play automatically. Coding Standards for Assignment: * Typescript * Functional Components * Hooks * Prettier and Linter configuration * Had to Refer and use the provided design pdf for the app. Round 2 Coding Meet (1.3 hrs) - The interviewer gave me the brief of what the projects are there in the company and if selected then what will be my responsibilities. Then the interviewer asked me to rate myself out of 5 in the javascript language. - Basic Concepts of Javascript and ES6. - Multiple output based conceptual questions on Javascript & React. Round 3 (Technical Interview with CEO) Didn't get selected for round 3 so don't know the exact questions.

      Interview questions [10]

      Question 1

      Explain few of the es6 features in javascript?
      Answer question

      Question 2

      Define primitive and non primitive data types in javascript?
      Answer question

      Question 3

      Difference between == and === operands in javascript? What will be the output of console.log([] == []) and console.log([] === []) ?
      Answer question

      Question 4

      Explain the concept of hoisting in javascript? An output based question on hoisting?
      Answer question

      Question 5

      Write a program to print numbers from 0 to 100 without using any iterator methods i.e loops, array methods (map, foreach, etc)?
      1 Answer

      Question 6

      How will you integrate multiple APIS in your project where one api response needs to be succeeded beforehand then the next promise needs to be resolved?
      Answer question

      Question 7

      How will you stop re-rending a component when a variable inside of it (*not a state) which holds some data is changed?
      Answer question

      Question 8

      Explain some of the new features that are introduced in the latest version of react native?
      Answer question

      Question 9

      Explain memoization and the usememo hook in react?
      Answer question

      Question 10

      Questions on array methods like map, filter and reduce. Filter even numbers from an array, calculate the sum of all elements in an array.
      Answer question
      3