Which PHP feature allows specifying default values for function arguments?

What will be the output of the following PHP code?
<?php
$greet = function($name) {
return 'Hello, $name!';
};
echo $greet('John');
?

A). Hello, John!

B). Hello, $name!

C). function($name) { return 'Hello, $name!'; }

D). John

Which of the following statements about returning values from PHP functions is true?

A). PHP functions can return multiple values simultaneously

B). PHP functions cannot return values

C). PHP functions must always return a value

D). PHP functions can only return values of type string

What will be the output of the following PHP code?
<?php
function add($a, $b) {
return $a + $b;
}
$result = add(5, 3);
echo $result;
?

A). 8

B). add(5, 3)

C). function add($a, $b) { return $a + $b; }

D). $a + $b

What is the purpose of the return statement in PHP functions?

A). To output a value from the function and terminate its execution

B). To specify the return type of the function

C). To declare a variable within the function

D). To terminate the function execution

Which PHP feature allows defining functions with variable-length argument lists?

A). Dynamic functions

B). Variable arguments

C). Varargs

D). All of the above

Which PHP keyword is used to define functions without specifying their names?

A). Dynamic functions

B). Anonymous functions

C). Inner functions

D). Nested functions

What will be the output of the following PHP code?
<?php
function sum($a, $b = 5) {
return $a + $b;
}
echo sum(3);
?

A). 3

B). 8

C). 5

D). Function call will result in an error

What is the output of the following PHP code?
<?php
function multiply(...$args) {
$result = 1;
foreach ($args as $value) {
$result *= $value;
}
return $result;
}
echo multiply(2, 3, 4);
?

A). 24

B). 9

C). 6

D). 2

What will be the output of the following PHP code?
<?php
function factorial($n) {
$result = 1;
for ($i = 1; $i <= $n; $i++) {
$result *= $i;
}
return $result;
}
echo factorial(5);
?

A). 120

B). 5

C). Undefined function: factorial

D). Function factorial($n) { $result = 1; for ($i = 1; $i <= $n; $i++) { $result *= $i; } return $result; }

What is the purpose of passing arguments to a function in PHP?

A). To specify the return value of the function

B). To allow the function to accept input data

C). To define the function name

D). To terminate the execution of the function