sqrt() — PHP Technical Interview Questions & Answers

sqrt()

sqrt()

  • sqrt() is a PHP topic. In plain words you use it for a short sqrt example in a college portal page. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest sqrt example you can type. Type it, run it, and say what you see. If you can do that from memory, you know sqrt().
  • From the example next to this theory: sqrt(): scores array, print avg, then high marks.
  • Trap: only saying “sqrt” with no example. Fix that before you talk about advanced PHP.
  • Viva: what is sqrt()? Then show the smallest sqrt example you can type. Then name the trap.

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

Code Examples for sqrt()

sqrt() — working example

<?php
// sqrt()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

sqrt(): scores array, print avg, then high marks. Say the output.

How to Explain sqrt() to an Interviewer

What is sqrt()?

Used for a short sqrt example a college portal page Not just the heading

Give one small example of sqrt().

the smallest sqrt example you can type sqrt(): scores array, print avg, then high marks

What mistake do beginners make with sqrt()?

only saying “sqrt” with no example Show the fix

Where do you use sqrt()?

a college portal page a short sqrt example