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Interview Prep: HTML, CSS & JS

HTML

  • What is DOM ?
  • Methods of Document Object ?
  • HTML form and diff types of input and enctype attribute ?
  • What are HTML Entities ?
  • How to optimize website assets loading?
  • Use of iframe ?
  • Inline vs block vs inline-block.
  • link vs anchor.
  • fig vs img vs picture.
  • Storage in HTML5.
  • Output tag and oninput attribute in forms.
  • Custom attribure in html5.
  • Graphics rendering in html5.
  • Media tags in html5.
  • Geolocation API in html5
  • Drag-And-Drop APIs in html5.
  • Why do we use web workers.
  • Manifest file and installing a service worker.

CSS

  • Position property with examples.
  • Display property with examples.
  • Padding, margin, content, border of Box model.
  • How to override styles applied via a base file.

JS

  • Explain and demonstrate $map(), filter(), reduce(), find(), findexInde(), fill()$.
  • Map vs forEach(side-effect of using forEach).
  • Event loop ,message queue and function call stack in JS ?
  • Is JS synchronous or async ?
  • What is a middleware ?
  • Hoisting in JS.
  • $ == $ vs $ === $.
  • Impilicit and explicit type conversion.
  • Passed by value vs passed by reference.
  • Expain truthy and falsy values(All values except $false, 0, 0n, -0, “”, null, undefined$ and $NaN$ are truthy values).
  • Return values of logical operators.
  • Data types in JS.
  • $undefined$ vs $null$ vs $NaN$.
  • Explain and demonstrate immediately invoked function.
  • Explain and demonstrate higher order functions in JS.
  • Explain and demonstrate “this”.
  • Explain and demonstrate scope chain in JS.
  • Explain and demonstrate closures in JS.
  • Explain and demonstrate $map(), filter(), reduce(), find(), findexInde(), fill()$.
  • Map vs forEach(side-effect of using forEach).
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