Free React JavaScript Q&A - Get Your Questions Answered

Which command is used to launch the local development server for React?

npm start

npm run dev

npm run

npm build

Correct! Wrong!

What does the command's reference to "my-app" mean?

npx create-react-app my-app

The title that you want to give your new app

The brand of a current app

What kind of software you want to develop

The location where you wish to put your app

Correct! Wrong!

When rendering a list using the JavaScript map() method, what is required for each element rendered?

ID

Key

Data

Index

Correct! Wrong!

React components must start with a capital letter

False

True

Correct! Wrong!

What is the children prop?

A property that lets you nest components in other components

A property that lets you pass data to child components

A property that lets you set an object as a property

A property that lets you add child values to state

Correct! Wrong!

Which command should be used to start a new React project?

npx create-react-app my-app

npm create-react-app my-app

npx create-react-app my-app

npm create-react-app my-app

Correct! Wrong!

Which of the following is NOT a rule for React Hooks?

Hooks can only be called at the top level of a component

Hooks can only be called in inside React function components

Hooks cannot be conditional

Hooks can be called in class or function components

Correct! Wrong!

FREE React Javascript Questions and Answers

Which command is used to launch the local development server for React?

What does the command's reference to "my-app" mean? npx create-react-app my-app

When rendering a list using the JavaScript map() method, what is required for each element rendered?

React components must start with a capital letter

What is the children prop?

Which command should be used to start a new React project?

Which of the following is NOT a rule for React Hooks?

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What does the command's reference to "my-app" mean?

npx create-react-app my-app