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JavaScript Basics Quiz – True or False Questions for Beginners

Test your understanding of JavaScript fundamentals with this beginner-friendly true or false quiz. Learn key concepts like variables, functions, DOM manipulation, and script placement in a fun and simple format.

🔍 True or False

🟢 Beginner

  1. JavaScript can be used to change the content of an HTML element dynamically.
    2. Answer

    ✅ True – JavaScript can manipulate the DOM using methods like `document.getElementById().innerHTML`.

  2. The `alert()` function writes content directly into the HTML document.
    3. Answer

    ❌ False – `alert()` displays a popup message, it does not write content into the document.

  3. It is a best practice to place JavaScript code at the end of the body tag.
    4. Answer

    ✅ True – Placing scripts at the end of the body allows the HTML to load before the JavaScript executes.

  4. A JavaScript variable can hold different types of values at different times.
    5. Answer

    ✅ True – JavaScript is dynamically typed, which means a variable can be reassigned to different data types during execution.

  5. The `prompt()` function can be used to take input from the user.
    6. Answer

    ✅ True – `prompt()` opens a dialog box for the user to enter input.

  6. JavaScript functions cannot return values.
    7. Answer

    ❌ False – JavaScript functions can return values using the `return` statement.

  7. External JavaScript files are included in HTML using the `<link>` tag.
    8. Answer

    ❌ False – External scripts are included using the `<script src="..."></script>` tag.

🟡 Intermediate

  1. The `defer` attribute ensures scripts are executed after the HTML is parsed.
    2. Answer

    ✅ True – The `defer` attribute defers execution of the script until after the document has been parsed.

🔴 Advanced

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🧠 Practice & Progress

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