CSS (Cascading Style Sheets) is a stylesheet language used for describing the look and formatting of a document written in HTML.

CSS is used to control the layout and appearance of web pages and make it easy to change the look of a whole website by changing just a few lines of code.

With CSS, you can specify things like the font, color, size, and spacing of elements on a webpage, as well as the more advanced layouts and design features such as gradients, shadows, and animations.

If you are looking for Front-End Developer Job or UI Developer Job, This article will help you to do preparation for the interview with Important CSS Interview Questions. So let's go:

1. What is Stylesheet?

A stylesheet is used to build a consistent, transportable, and well-designed style template. It describes the look and formatting of the document.

2. What is the latest version of CSS?

CSS basically consists of many drafts for upcoming Standards. CSS3 is the latest version of CSS. It helps you to control the styling of the website.

3. Explain the new features in CSS3.

CSS basically consists of many drafts for upcoming Standards.

CSS3 includes some new features like:

• New Selectors
• CSS Variables
• CSS Functions
• Gradients
• Opacity
• Transitions
• Transformation
• Animations
• FlexBox
• Grid
• Media Queries

4. Explain Different Types of Selectors

CSS selectors are used to find the particular HTML element which you want to style or represent in a different form.

CSS Selectors consist of different types:

1. Universal Selector

It is denoted using (*) in CSS. It sets the particular style for all the HTML elements within the HTML page.

2. Element type Selector

The element selector selects a particular HTML tag/element from your document. This may include <p>, <span>, <strong> etc.

3. Id Selector

The id selector is denoted with a (#) character followed by the Id of the element. It can be used only once per page, as elements consist of a single Id value. It selects an element that has an Id set on it.

4. Class Selector

The Class selector is denoted with a (.) character followed by the class name of the element. It is used to select all the elements with a particular Class name. It sets a particular style for several HTML elements.

5. Grouping Selector

Grouping Selector helps us to assign the same style definitions to different HTML elements. This helps in minimizing our code and reduces a lot of effort rather than re-writing.

5. Tell me the difference between inline-block, block, and inline

1. block-level element starts with their own new line and takes space for an entire row.

Example - <div>, <p>

2. inline-block begins on the same line, except they have padding and margins on all 4 sides.

3. Inline also begins on the same line itself and it has content or tags before or after it.

Example - <a>, <span>

6. What is z-index and why it is used?

z-index in CSS is a property that is used to define the order of elements on the z-axis. It defines the order of overlapping HTML elements.

Elements with a higher index will be placed on top of elements containing a lower index.

7. What is the difference between padding and margin?

• Margin - Margin defines the space around the element's border.
• Padding - Padding defines the space between the element's border.

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