Why is React using the concept of components?

• It helps accessibility readers for people who are visually impaired.

• It improves the styling of your pages.

• It allows the browser to render your pages faster.

• It allows you to build more modular apps.

What is the absolute minimum code that a component must have to be able to show something on a screen when rendered?

• A named function declaration and a return statement with at least a single element with some text inside of it.

• A named function declaration and an array of items inside of the function's body.

• A named function declaration and some variables in the function’s body.

• A named function declaration.

What are the benefits of using props?

• Props allow developers to write custom HTML tags.

• Props allow parent components to pass data to children components.

• Props allow children components to update the values of each prop independent from their parent component.

You are tasked with building a web layout using React. The layout should have a header, a footer, and three products showing various data in the main part of the page. Choose the preferred component structure.

• It should have the following components: Header, Main, Product, Footer (with the Product component being imported into Main and rendered three times).

• It should have a separate component for each link, paragraph, heading, etc.

• It should all fit into a single component named App component.

Which of the following keywords can you usually find in a React component?

• function, props, export, import, contain

• module, function, prop, exported, default

• function, props, return, export, default

• modular, expression, prop, default

What is create-react-app?

• It’s a command you run when you want to serve your app in the browser.

• It’s an npm package used to build a boilerplate React app.

• It’s a command you can use in a component.

• It’s a stand-alone application on the web.

Imagine you want to build a brand new React app, named “example”. Choose the correct command to build a starter React app to work off of.

• npm install react-app example

• node init react-app example

• npm init react-app example

• npm initialize react-app example

True or false? When you write arrow functions, for any number of parameters other than a single parameter, using parentheses around parameters is compulsory.

• True.

• False

True or false? You can use function calls in JSX.

• True

• False

True or false? When an arrow function has a single parameter, you do not need to add parentheses around the item parameter (to the left of the arrow).

• True

• False