CSS property: height MCQs Quiz | Class 10

This quiz is designed for Class X students studying Computer Applications (Code 165), focusing on Unit 2: HTML. It covers the essential concepts of the ‘height’ CSS property and its application in controlling element dimensions, specifically regarding element height. Test your knowledge on how to set, constrain, and manage the vertical size of elements. Submit your answers to see your score and download a detailed PDF of your results.

Understanding the CSS ‘height’ Property

The CSS height property is fundamental for controlling the vertical dimension of HTML elements. It allows web developers to specify how tall an element should be, ensuring layout consistency and aesthetic appeal. Understanding its various units, related properties like min-height and max-height, and its interaction with content flow is crucial for effective web design.

Key Concepts of ‘height’

  1. Definition: The height property sets the height of an element’s content box. This does not include padding, borders, or margins unless box-sizing: border-box; is used.
  2. Units of Measurement:
    • Absolute Units:
      • px (pixels): Fixed size, independent of other elements.
    • Relative Units:
      • % (percentage): Relative to the height of the parent element. For this to work, the parent must have a defined height.
      • em: Relative to the font-size of the element itself.
      • rem: Relative to the font-size of the root element (html).
      • vh (viewport height): Relative to 1% of the viewport’s height.
    • auto: The browser calculates the height based on the content. This is the default value.
  3. min-height and max-height:
    • min-height: Ensures an element is at least a certain height, preventing it from shrinking too much.
    • max-height: Prevents an element from becoming taller than a specified height, useful for controlling layout and preventing content overflow in certain scenarios.
  4. Block vs. Inline Elements: The height property primarily applies to block-level elements (e.g., div, p, h1). It typically has no effect on inline elements (e.g., span, a) unless their display property is changed to block or inline-block.
  5. overflow Property: When an element has a fixed height and its content exceeds that height, the overflow property (e.g., visible, hidden, scroll, auto) determines how the overflowing content is handled.

Quick Revision

  • height: auto; is the default and lets content determine height.
  • Use px for fixed heights, % for responsive heights relative to parent.
  • vh is for heights relative to the viewport.
  • min-height and max-height are crucial for responsive design.
  • height generally applies to block-level and inline-block elements.
  • Manage content overflow with the overflow property.

Practice Questions

  1. What is the effect of setting height: 0; on an element?
  2. Explain the difference between height: 100%; and height: 100vh;.
  3. When would you use min-height instead of height?
  4. Can the height property be animated with CSS transitions?
  5. How does box-sizing: border-box; affect the calculated height of an element when using the height property?

Author

  • CBSE Quiz Editorial Team

    Content created and reviewed by the CBSE Quiz Editorial Team based on the latest NCERT textbooks and CBSE syllabus. Our goal is to help students practice concepts clearly, confidently, and exam-ready through well-structured MCQs and revision content.