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HTML, CSS, and Javascript for Web Developers Certification

HTML, CSS, and JavaScript are core technologies used in web development to create and enhance websites and web applications. Here’s a brief overview of each:

  1. HTML (Hypertext Markup Language):
    • Purpose: HTML is the standard markup language used to create the structure and content of web pages.
    • Role: It defines the elements and their semantic meaning on a web page, such as headings, paragraphs, lists, links, forms, images, and more.
    • Example: <h1>This is a Heading</h1>, <p>This is a paragraph.</p>
  2. CSS (Cascading Style Sheets):
    • Purpose: CSS is used for styling and presentation. It controls how HTML elements are displayed, including their layout, colors, fonts, and responsiveness.
    • Role: It separates the content (HTML) from the presentation (CSS), allowing developers to style web pages consistently and make them visually appealing.
    • Example: h1 { color: blue; font-size: 24px; }
  3. JavaScript:
    • Purpose: JavaScript is a versatile scripting language used to add interactivity and functionality to web pages.
    • Role: It allows web developers to create dynamic elements, handle user interactions, validate forms, make asynchronous requests to servers (AJAX), and build complex web applications.

HTML Questions:

  • Local Storage
  • Offline Storage
  • Session Cache
  • Web Storage
  • It defines a section that contains navigation links
  • It represents a standalone piece of content, such as an image or diagram
  • It defines a table for data presentation
  • It specifies the footer of a document or section
  • <input type=”date”>
  • <input type=”datetime”>
  • <input type=”calendar”>
  • <input type=”time”>

CSS Questions:

  • Text alignment
  • Element visibility
  • The stacking order of elements
  • Background color
  • ID selector (#myElement)
  • Class selector (.myClass)
  • Element selector (div)
  • Universal selector (*)
  • :hover
  • :active
  • :focus
  • :current

JavaScript Questions:

  • A function that has no return statement
  • A variable declared within a function
  • A function that references variables from its parent function’s scope even after the parent function has finished executing
  • A function that can only be called once
  • To concatenate two strings
  • To create a new array
  • To associate a function with a specific context or object
  • To filter elements in an array
  • It specifies that the script should be executed asynchronously, without waiting for the HTML to be fully parsed.
  • It ensures that the script is executed in the order it appears in the HTML document.
  • It guarantees that the script will block the rendering of the page until it is fully loaded.
  • It is not a valid attribute for including external JavaScript files.
  • “function”
  • “object”
  • “method”
  • “undefined”
  • True
  • False
  • Undefined
  • NaN
  • To remove elements from an array
  • To iterate over each element of the array and return a new array with modified values
  • To concatenate two arrays
  • To check if an element exists in an array

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