rogers.william43
rogers.william43 2d ago • 0 views

React JSX Multiple Choice Questions: Assessment for Web Development

Hey there! 👋 Learning React JSX can be tricky, but with a little practice, you'll nail it! This guide and quiz will help you test your knowledge and become a JSX pro. Let's dive in and level up your web development skills! 💻
💻 Computer Science & Technology

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craig_wilson Dec 31, 2025

📚 Quick Study Guide

  • JSX Basics: JSX (JavaScript XML) is a syntax extension to JavaScript that allows you to write HTML-like structures in your JavaScript code.
  • ✍️ JSX Transformation: JSX code needs to be transformed into regular JavaScript for browsers to understand it. This is typically done using tools like Babel.
  • ⚛️ React Elements: JSX expressions are translated into React elements, which describe what you want to see on the screen.
  • 🏷️ HTML Attributes in JSX: HTML attributes are used similarly in JSX, but some names are different (e.g., `className` instead of `class`).
  • 🧮 Embedding Expressions: You can embed JavaScript expressions within JSX using curly braces `{}`. For example, `

    {2 + 2}

    ` will render `

    4

    `.
  • 🧱 JSX Restrictions: A JSX expression must have one top-level element. If you need to render multiple elements, wrap them in a parent element like a `
    ` or use a React Fragment `<>...`.
  • 🖋️ Comments in JSX: Use curly braces `{}` to include comments within JSX. For example, `{/* This is a comment */}`.

🧪 Practice Quiz

  1. What is JSX?
    1. A new programming language.
    2. A syntax extension to JavaScript.
    3. A type of CSS.
    4. A database query language.
  2. Which tool is commonly used to transform JSX into regular JavaScript?
    1. Webpack
    2. Babel
    3. Sass
    4. Node.js
  3. In JSX, how do you embed a JavaScript expression?
    1. Using parentheses `()`
    2. Using curly braces `{}`
    3. Using square brackets `[]`
    4. Using angle brackets `<>`
  4. What is the equivalent of the HTML `class` attribute in JSX?
    1. `class`
    2. `className`
    3. `style`
    4. `cssClass`
  5. Which of the following is a valid way to render multiple elements in JSX?
    1. ``
    2. `{element1, element2}`
    3. `
      `
    4. ``
  6. How do you write a comment within JSX?
    1. `// This is a comment`
    2. ``
    3. `{/* This is a comment */}`
    4. `/* This is a comment */`
  7. What does JSX code get transformed into?
    1. HTML elements
    2. React elements
    3. CSS styles
    4. DOM nodes
Click to see Answers
  1. B
  2. B
  3. B
  4. B
  5. C
  6. C
  7. B

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