Infosys Technology Analyst Interview Questions, Process, and Tips

Include and require are both used to include external files in PHP, but require will cause a fatal error if the file is not found.

• Include will only produce a warning if the file is not found, while require will stop the script execution.

• Include is used when the file is not critical for the script to run, while require is used when the file is essential.

• Example: include 'header.php'; require 'config.php';

Array push is a method in JavaScript used to add one or more elements to the end of an array.

• Array push is a built-in method in JavaScript.

• It adds one or more elements to the end of an array and returns the new length of the array.

• Example: let arr = ['apple', 'banana']; arr.push('orange'); // arr is now ['apple', 'banana', 'orange']

Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to represent multiple data types.

• Examples include method overloading and method overriding in object-oriented programming.