CSS Units — CSS Technical Interview Questions & Answers

px, %, em, rem, vh, vw and when to use each.

CSS Units

  • Units (css) is a CSS topic. In plain words you use it for a short Units css example in the look of a page. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Units css example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Units (css).
  • From the example next to this theory: px, %, em, rem, vh, vw and when to use each.
  • Trap: only saying “Units css” with no example. Fix that before you talk about advanced CSS.
  • Viva: what is Units (css)? Then show the smallest Units css example you can type. Then name the trap.

Technical Interview Tip: What is Units (css)? Show this: the smallest Units css example you can type. Trap: only saying “Units css” with no example.

Code Examples for CSS Units

CSS Units — working example

html {
  font-size: 16px;
}

.title {
  /* rem → root; em → parent */
  font-size: 1.5rem;
  margin-bottom: 0.75em;
  padding-inline: 1rem;
}

.hero {
  min-height: 50vh;
  width: 80vw;
}

CSS Units — rem is predictable vs root; em compounds with parent; vh/vw/% size relative to viewport or parent.

How to Explain CSS Units to an Interviewer

What is Units (css)?

Used for a short Units css example the look of a page Not just the heading

Give one small example of Units (css).

the smallest Units css example you can type px, %, em, rem, vh, vw and when to use each

What mistake do beginners make with Units (css)?

only saying “Units css” with no example Show the fix

Where do you use Units (css)?

the look of a page a short Units css example