Top interview questions related 🌟 HTML, CSS, and JavaScript Essentials! 🌟

💡 HTML:

• Full form of HTML: HyperText Markup Language
• Use of HTML: HTML is used to create the structure and layout of web pages and websites.
• HTTP: Stands for Hypertext Transfer Protocol, used for transmitting data on the World Wide Web.
• Difference between HTTP and HTTPS: HTTPS is secure and encrypts data, while HTTP does not.
• Order of website loading: Typically, HTML content loads first, followed by CSS and JavaScript.
• Difference between elements and tags: Elements are the building blocks of HTML, while tags are the markers that define the beginning and end of elements.
• Semantic tags in HTML: Semantic tags provide meaning to the content, such as <header>, <footer>, <nav>, etc.
• Self-closing tag: Tags like <img> and <br> that do not require a closing tag.
• DOCTYPE declaration: Specifies the version of HTML being used in a document.
• Attributes in HTML: Class, ID, src, href, style are used to provide additional information about HTML elements.
• Meta tags: Used to provide metadata about the HTML document, such as character set, viewport settings, etc.
• SVG and Canvas tag: Used for drawing graphics on the web. SVG is vector-based, while Canvas is raster-based.
• Difference between <div> and <span> tag: <div> is a block-level element, while <span> is an inline element.

💡 CSS:

• Full form of CSS: Cascading Style Sheets.
• Meaning of cascading: Refers to the order in which styles are applied to HTML elements.
• Specificity in CSS: Determines which style rule takes precedence when multiple rules apply to the same element.
• Importance of cascade in CSS: Allows for efficient styling and overriding of styles.
• Selectors: ID, class, and tagname selectors are used to target specific elements for styling.
• Order of selector preference: ID > Class > Tagname (specificity).
• Use of "important" keyword: To prioritize a style rule over others.
• Default value of position property: "static".
• Flexbox: A layout model in CSS for designing flexible and responsive layouts.

💡 JavaScript:

• Single-threaded nature of JavaScript: JavaScript is single-threaded.
• Data types: Primitive (number, string, boolean, null, undefined, symbol) and non-primitive (object, array, function).
• Variables: let, var, and const are used to declare variables.
• Difference between let and var: let has block scope, while var has function scope.
• Scope in JavaScript: Local, global, block, and lexical scope.
• Functions: Traditional functions and arrow functions are used for defining reusable blocks of code.
• DOM: Document Object Model represents the structure of HTML documents and allows JavaScript to manipulate it.

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