React Test

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Type

Programming Skills

Time

10 minutes

Level

Medium

Questions

About the Test

The questions cover the general react js, the main components used in react, React Router techniques, and the testing libraries used in ReactJS.

React is a JavaScript library for building user interfaces. It was developed by Facebook, and is often used for building single-page applications and mobile applications.

React allows developers to create reusable UI components. It also uses a virtual DOM (a lightweight in-memory representation of the real DOM), which allows for efficient updates to the actual DOM. This can help improve the performance of web applications, as it reduces the need to directly manipulate the DOM and allows for more efficient rendering of components.

Overall, React is a popular choice for building modern web and mobile applications due to its declarative style, performance benefits, and the ability to create reusable components.

Skills Measured

Introduction
Components
ReactJS Router
Testing patterns

Roles

ReactJS Developer
Frontend Developer
Technology Analyst
IT Delivery
Web Developer
Full-Stack Developer

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Introduction

React is a JavaScript library for building user interfaces. It was developed by Facebook, and is often used for building single-page applications and mobile applications. React allows developers to create reusable UI components, and it uses a virtual DOM to improve the performance of web applications.

Components

In React, a component is a piece of reusable code that represents a part of a UI. Components can be used to represent simple UI elements, such as a button or a form, or more complex UI elements, such as a navigation bar or a product list. Components can be composed of other components, allowing developers to build large, complex UI applications from smaller, reusable pieces.

ReactJS Router

React Router is a popular library for routing in React applications. It allows developers to define the routes in their application, and to specify the components that should be rendered for each route. This allows developers to create single-page applications with multiple views, and to update the UI in response to changes in the route.

Testing patterns in React

There are various testing patterns that can be used in React applications. One popular approach is to use unit tests to test individual components in isolation, and to use integration tests to test the behavior of multiple components together. Testing tools such as Jest and Enzyme are often used to help with testing React applications. It’s also important to consider testing best practices, such as writing tests that are easy to understand, maintain, and debug, and using test-driven development (TDD) to ensure that the application is thoroughly tested.

The test is created by a subject-matter expert

Testlify’s skill tests are designed by experienced SMEs (subject matter experts). We evaluate these experts based on specific metrics such as expertise, capability, and their market reputation. Prior to being published, each skill test is peer-reviewed by other experts and then calibrated based on insights derived from a significant number of test-takers who are well-versed in that skill area. Our inherent feedback systems and built-in algorithms enable our SMEs to refine our tests continually.

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Frequently Asked Questions for React

A React assessment is a test or evaluation that is used to assess a person’s proficiency in using the React library to build web applications and integrate with back-end APIs and data sources.

A React assessment can be used by recruiters and hiring managers to evaluate candidates’ knowledge of React concepts and syntax, as well as their ability to write code using React components and APIs and debug and troubleshoot React code.

ReactJS Developer
Frontend Developer
Technology Analyst
IT Delivery
Web Developer
Full-Stack Developer

Introduction
Components
ReactJS Router
Testing patterns

A React developer is responsible for using the React library to design, build, and maintain web applications. This may involve building user interfaces, integrating with back-end APIs and data sources, debugging and troubleshooting code, collaborating with other team members, and continuously learning about new React features and best practices.

Frequently Asked Questions (FAQs)

Want to know more about Testlify? Here are answers to the most commonly asked questions about our company.

These are ready-made tests, existing in our test library, created by subject matter experts. We have 200+ such skills tests covering various skills from programming skills to DevOps, including Aptitude and Personality testing.

You can go to the ‘Test Library’ tab and search for tests from the Job Role or Test Type drop-down menu.

Currently, we do not offer any sample tests. However, when you select a test, there would be a few practice questions before the start of the actual test, which would give you a fair idea of how the entire test would look.

Our tests typically take between 25-30 minutes to complete.

In case you need to test for a unique skill-set or specialized experience, you can add your own questions and customize the test to suit your requirements.

We’ve put a lot of effort into ensuring a conducive test environment. A stable internet connection, an internet browser with cookies and Java-Script enabled is all that is required!
However, for a smooth test-taking process, we recommend the following browsers:
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Yes, our tests are compatible with almost all modern mobile devices (including tablets) that have a webcam installed.

Yes, our tests are EEOC (Equal Employment Opportunity Commission) compliant and are whetted by subject matter experts, thus having high reliability (test consistency) and validity (accuracy of the test).

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