React Initial Review

What is React?

• A programming language used for web development

• A javascript library for building user interfaces

• A framework for creating mobile applications

• A database management system

What is the command to start a react application?

(a)  

• pnpm create vite

• yarn react-app

• npm install react-app

• npm react-app

What is JSX in React?

• Is a JavaScript syntax extension that allows us to mix JS and HTML (XML)

• A library of pre-written JavaScript code

• A type of JavaScript syntax used to define React components

• A programming language used to create web applications

Which of the following is a way to handle data in React.js?

(a)  

• State & Props
• Services & Components
• State & CSS
• State & Services

What is the method used in the main.tsx page in react to render the elements on the web page?

(a)  

• render()
• createElement()
• compile()
• mount()

What is the purpose of the useState hook in React?

(a)  

• To update the state of a component
• To handle user events
• To access data from an external API
• To render elements on the page

What will the useState function return?

• A string representing the current state of the component

• An object containing the current state and a function to update the state

• A function used to update the state

• The current state value and a function to update the state

What's the magic formula for using the useState hook?

(a)  

• useState(value)

• UseState(value)

• useState[value]

• useState[value, setValue]

Can you use useState more than once in a React component?

• No, it can only be used once per component

• Yes, it can be used multiple times in a component

• Can only be used more than once in class components

• Depends on the size of the component

Can you use any value to initialize the state of the useState hook?

• No, you can only use values of type string

• No, you can only use numeric values

• Yes, you can use any value

• No, you can only use objects