• Answer given by candidate

<?php

$arr = array(64,34,25,12,22,11,90);



$n = count($arr);



for($i=0;$i<$n -1;$i++)

{

    for($j=0;$j<$n-$i-1;$j++)

    {

        if($arr[$j]>$arr[$j+1])

        {

            $temp = $arr[$j];

            $arr[$j] = $arr[$j+1];

            $arr[$j+1] = $temp;

        }

    }

}



echo "Array in ascending order: ";

foreach ($arr as $value){

    echo $value. " ";

}

?>

• Output

Array in ascending order: 11 12 22 25 34 64 90

• Answer given by candidate

<?php

$string = "Hello World";



$reversed = "";



for($i = strlen($string) -1;$i>=0;$i--)

{

    $reversed .= $string[$i];

}



echo "Original string :".$string;

echo "\n";

echo "Reversed string :".$reversed;

?>

• Output

Original string :Hello World
Reversed string :dlroW olleH

• Answer given by candidate

A REST API is an architectural style that allows different software applications to communicate with each other over the internet.It uses standard web protocols - primarily HTTP - to request , create, update, or delete data.

GET - Retrieves data

POST - Sends new data to create a resource

PUT - Overwrites an entire resource with new data

DELETE - Permanently removes the resource

• Answer given by candidate

React components are the fundamental, reusable building blocks of a user interface(UI) in a React application.They act like independent Javascript functions or classes that accept inputs and return JSX code to specify what should render on the screen.

Functional Components - These are standard JavaScript functions.They directly return the JSX that defines the UI.

Class components - They cannot return JSX directly.They must wrap the return statement inside a required render() method.

• Answer given by candidate

SQL databases are relational and table-based with strict schemas, whereas NoSQL databases are non-relational,distributed, and support flexible data models like documents or key-value pairs.

Choose a SQL database if your system priortizes data validity,complex relationships and bulletproof transactions.

Choose a NoSQL database if the system priortizes massive scale, rapid features deployment.