CSS Interview Questions Experienced Programmers
CSS is one of the most popular web technology use for designing the content of web page. It makes web pages interactive and performs function like animation, includes colors, layout, and fonts etc.
1. What is a different way to assign a colour to an element in CSS?
You can use Hexadecimal notation, RGB functional notation, and HSL functional notation to assign a colour to an element in CSS.
2. What is Box Model in CSS?
The CSS box model is a container that contains multiple properties including borders, margin, padding and the content itself. It is used to create the design and layout of web pages. It can be used as a toolkit for customizing the layout of different elements.
3. What is the use of z-index in CSS?
z-index in CSS is used to define the stack order of positioned elements. The default value of z-index is 0.
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4. What are CSS Sprites?
A CSS sprite is a performance optimization technique that combines multiple images into a single image called a sprite sheet or tile set. Sprites reduce network congestion by reducing the number of downloads needed to render a web page.
5. Tell me the use of a box-shadow in CSS?
The box-shadow property enables you to cast a drop shadow from the frame of almost any element. If a border-radius is specified on the element with a box shadow, the box shadow takes on the same rounded corners.
6. What is CSS flexbox?
The Flexbox Layout officially called CSS Flexible Box Layout Module is new layout module in CSS3 made to improve the items align, directions and order in the container even when they are with dynamic or even unknown size.
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7. What is CSS BEM
The BEM methodology is a naming convention for CSS classes in order to keep CSS more maintainable by defining namespaces to solve scoping issues. BEM stands for Block Element Modifier which is an explanation for its structure. A Block is a standalone component that is reusable across projects and acts as a "namespace" for sub-components (Elements). Modifiers are used as flags when a Block or Element is in a certain state or is different in structure or style.
8. What is tweening in css?
Tweening is the process of generating in-between frames i.e. developing frames between two images to create an appearance in which first image generate its replica into the second image. In other words we can say that the object automatically generate its transition from first frame to he last by just flash.
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9. What are counters in CSS?
CSS counters are similar to variables. These are maintained by CSS and those values can be incremented by CSS rules to track how many times they are used.
10. What is a pseudo element in CSS?
pseudo-elements helps you to add cosmetics contents. pseudo elements generates content where as pseudo-class deals with state of the element. for example, you can style :first-letter of every paragraph. similarly, :first-line and fancy stuff with :before, :after
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