Overview of CSS and its role in web development Mocktest

CSS stands for Cascading Style Sheets. It is a style sheet language used for describing the presentation of a document written in HTML.

The selector "1stParagraph" is not valid in CSS as selectors cannot start with a digit. Valid selectors include IDs (#), classes (.), elements, descendant selectors, child selectors, attribute selectors, etc.

The "font-size" property in CSS is used to change the size of the font.

The "Cascading" in CSS refers to the process of combining multiple stylesheets and resolving conflicts according to a specific order, such as user agent styles, author styles, and user styles.

The "color" property in CSS is used to specify the color of the text.

The CSS box model defines the layout and design of a webpage by breaking down elements into rectangular boxes, consisting of content, padding, border, and margin.

The "line-height" property in CSS is used to control the spacing between lines of text.

The "display: none;" property in CSS hides the element and removes its space from the layout.

The "em" unit in CSS is based on the font size of the root element (usually the element).

CSS frameworks like Bootstrap provide pre-designed UI components, grids, and stylesheets to streamline web development and ensure consistency in design across applications.