What will be the output of the following PHP code?

$x = 5;
echo $x--;
echo $x;
?>

Which of the following statements is true about PHP comments?

A). Comments are ignored by the PHP interpreter

B). Comments can only be single-line

C). Comments must start with /* and end with */

D). Comments are displayed on the webpage

Which of the following PHP operators is used for concatenation of strings?

A). .

B). +

C). &&

D). *

What is the value of $x after the following PHP code is executed?

<?php
$x = 5;
$x += 3;
echo $x;
?>

A). 5

B). 8

C). 15

D). 3

Which of the following PHP functions is used to convert a string to uppercase?

A). strtoupper()

B). ucwords()

C). strtolower()

D). ucfirst()

What data type is the variable $age = 25; in PHP?

A). Integer

B). String

C). Boolean

D). Float

Which of the following is a correct way to increment the value of a variable $count by 1 in PHP?

A). $count++;

B). $count += 1;

C). $count = $count + 1;

D). $count =+ 1;

Which of the following PHP operators is used to compare whether two values are equal and of the same data type?

A). ===

B). ==

C). =

D). !=

What will be the output of the following PHP code?

<?php
$x = 10;
$y = 5;
echo $x + $y;
?>

A). 15

B). 5

C). 10

D). Error

What will be the output of the following PHP code?

<?php
$name = 'John';
echo 'Hello, $name!';
?>

A). Hello, John!

B). Hello, $name!

C). Hello, !

D). Undefined variable: name

Which of the following PHP functions is used to find the length of an array?

A). count()

B). length()

C). size()

D). sizeof()