Ing De Sistemas

Preguntas para preparación examen de certificación PHP –ZEND
El presente listado muestra unas preguntas que pueden ser tomadas como base para preparar el examen de certificación PHP desarrollado por ZEND.

*
* 1 Which of the following tags are an acceptable way to begin a PHP Code block?
-------------------------------------------------
Principio del formulario
* <SCRIPTLANGUAGE="php">
* <!
* <%
* <?php
* <?
Choose 4 answers || Final del formulario
 
* 2 Which of the following are valid PHP variables?
-------------------------------------------------
Principio del formulario
* @$foo
* &$variable
* ${0x0}
* $variable
* $0x0
Choose 4 answers ||Final del formulario 
* 3 What is the best way to iterate and modify every element of an array using PHP 5?
-------------------------------------------------
Principio del formulario
* You cannot modify an array during iteration
* for($i = 0; $i < count($array); $i++) { /* ... */ }
* foreach($array as $key => &$val) { /* ... */ }
* foreach($array as $key => $val){ /* ... */ }
* while(list($key, $val) = each($array)) { /* ... */
Choose 1 answer
 
* 4 What is the output of the following PHP code?

<?php

define('FOO', 10);

$array = array(10 => FOO,
"FOO" => 20);

print $array[$array[FOO]] * $array["FOO"];

?>
-------------------------------------------------
Principio del formulario* FOO
* 100
* 200
* 20
* 10
Choose 1 answer ||Final del formulario
 
* 5 What is the output of the following PHP script?
<?php

$a = 1;
$b = 2.5;
$c = 0xFF;

$d = $b + $c;
$e = $d * $b;
$f = ($d + $e) % $a;

print ($f + $e);

?>
-------------------------------------------------
Principio del formulario
*643.75
* 432
* 643
* 257
* 432.75
Choose 1 answer ||Final del formulario


 6 What combination of boolean values for $a, $b, $c, and $d will result in the variable $number being equal to 3?

<?php

$a = null;
$b = null;
$c = null;
$d = null;

if($a && !$b) {
if(!!$c && !$d) {
if($d && ($a || $c)) {if(!$d && $b) {
$number = 1;
} else {
$number = 2;
}
} else {
$number = 3;
}
} else {
$number = 4;
}
} else {
$number = 5;
}
?>
-------------------------------------------------
Principio del formulario
* false, true, true, true
* true, false, true, false
* true, true, false, false
* false, true,true, false
* false, false, true, false
Choose 1 answer || Final del formulario

 

 7 What is the output of the following code?

<?php

$string = "111221";

for($i = 0; $i < strlen($string); $i++) {

$current = $string[$i];
$count = 1;

while(isset($string[$i + $count]) && ($string[$i + $count] == $current)) $count++;$newstring .= "$count{$current}";

$i += $count-1;
}

print $newstring;
?>
-------------------------------------------------
Principio del formulario
* 312211
* 3312212
* 11221221
* 221131
* 3211122
Choose 1 answer ||Final del formulario


 
 8 What is the best way to ensure that a user-defined function is always passed an object as its single parameter?-------------------------------------------------
Principio del formulario
* function myfunction(stdClass $a)
* function myfunciton($a = stdClass)
* Use is_object() within the function
* There is no way to ensure the parameter will be an object
* function myfunction(Object $a)
Choose 1 answer || Final del formulario


 
 9 What does the following function do,...