Inheritance — PHP Technical Interview Questions & Answers

Inheritance

Inheritance

  • Inheritance is a PHP topic. In plain words you use it for class Student in a small OOP file. Don’t start with a slogan — start with that picture.
  • Smallest example: new Student('Asha', 72). Type it, run it, and say what you see. If you can do that from memory, you know Inheritance.
  • From the example next to this theory: Inheritance: scores array, print avg, then high marks.
  • Trap: public everything. Fix that before you talk about advanced PHP.
  • Viva: what is Inheritance? Then show new Student('Asha', 72). Then name the trap.

Technical Interview Tip: What is Inheritance? Show this: new Student('Asha', 72). Trap: public everything.

Code Examples for Inheritance

Inheritance — working example

<?php
// Inheritance
$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";
}

Inheritance: scores array, print avg, then high marks. Say the output.

How to Explain Inheritance to an Interviewer

What is Inheritance?

Used for class Student a small OOP file Not just the heading

Give one small example of Inheritance.

new Student('Asha', 72) Inheritance: scores array, print avg, then high marks

What mistake do beginners make with Inheritance?

public everything Show the fix

Where do you use Inheritance?

a small OOP file class Student