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).