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React.js Online Test

Topics Covered

  • Mounting Method
  • Render Function
  • Password Principles
  • Component Optimize
  • Default Values for Properties
  • Handling Events
  • React Facts

Useful for hiring

  • React.js Developer
  • JavaScript Developer – React.js
  • Front End Developer – React.js
  • React.js Consultant
  • Fullstack Developer – React.js

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"The best part of Interview Mocha is they have topic wise questions available. The skill wise extensive reports and advanced analytics lets us measure & benchmark the proficiency level of employees in that particular skill."

Cheryl Tolkinen, Securian, USA,
Learning & Development Manager
Question

How to create a component with multiple elements and no parent?

Note: There can be multiple correct answers to this question.

Answer
    • const Fruits = props => [
      <div key="apple">Apple</div>,
      <div key="orange">Orange</div>
      ];

    • const Fruits = props => (
      <React.Fragment>
      <div key="apple">Apple</div>
      <div key="orange">Orange</div>
      </React.Fragment>
      );

    • const Fruits = ['Apple', 'Orange'].map(fruit => <div key={fruit}>{fruit}</div>);

Question

How does React handle Web Accessibility Initiative - Accessible Rich Internet Applications (WAI-ARIA) standard?

Answer
    • aria-* HTML attributes are fully supported in JSX. Where most DOM properties and attributes in React are camelCased, these attributes should be lowercased

    • aria-* attributes should be converted to camelCase like other attributes eg. className, onChange and so on

    • React processes aria-* attributes separately and update the DOM for accessibility if the user requires it

    • React is yet to support WAI-ARIA standard

Test details:

React JS online test helps recruiters and hiring managers to evaluate the expertise of candidates in creating interactive UIs using React.js. Online React.js coding test is created & validated by experienced subject matter experts (SMEs) to assess & hire React JS developer as per industry standards.
 
React.js skills test may contain MCQs (Multiple Choice Questions), MAQs (Multiple Answer Questions), LogicBox (AI powered pseudo coding platform), coding simulator, Fill in the Blank, Descriptive, Whiteboard Questions, Audio / Video Questions, True or False.

Test Duration: 20 minutes

10 Application Questions

Test description:

React.js is an open-source JavaScript library used for building reusable UI components. It helps in building encapsulated components that manage their own state & then combine them to make complex UIs. React.js allows developers to create large web-applications that use data and can change over time without reloading the page. React processes only user interfaces in applications and aims primarily to provide speed, simplicity, and scalability.
 

Why use Interview Mocha’s React.js online test?
 

React JS online test helps employers in many ways including hiring job-fit candidate within a short time span, taking unbiased employee performance appraisal decisions, reduce hassle in mass recruitment, and more. Questions on mounting method, render function, password principles, component optimize will help you to assess React JS skills of the candidate. Our React JS coding test can be taken online by candidates from anywhere in the comfort of their time zone.

The React.js skills test helps to screen the candidates who possess traits as follows: 

1.  Thorough understanding of React.js and its core principles
2.  Ability to develop user interface components and implementation using popular React.js workflows such as Flux or Redux
3.  Excellent knowledge of core web fundamentals like HTML5, JavaScript (DOM manipulation and the JavaScript object model), and CSS3
4.  Familiarity with server-side scripting knowledge and interfacing
5.  Strong experience of working with data structure libraries
6.  Use our React JS assessment test or ask us to make a custom made test that includes skill set as per your job description.
 
Our React.js coding test reports are quick and provide you with insightful data, which will help you to select relevant candidates for the interview. You can use our role-based access control feature to restrict system access based on the roles of individual users within the recruiting team. Features like window violation and webcam proctoring help detect cheating while candidates attempt online React.js test.

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  • Add your own set of questions

  • Customize test settings like duration, number of questions, passing score, web proctoring and much more

  • Mail us at support@interviewmocha.com to create a custom test

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