Some ZCE Mock Exam Questions

07. Juli 2009

Tags:

answer

php

question

zce

zend certified engineer

Seite:

You'll find my answers on the next page. Have fun!

Question 1

What are the primary benefits of object oriented programming?

Answers: (choose 3)

Maintainability
Execution Speed
Encapsulation
Code Reuse

Question 2

The _____ keyword is used to block any overriding of a class/method by a subclass.

Answers:

static
None of the above
protected
final
private

Question 3

Event-based XML parsing is an example of which parsing model?

Answers:

SAX
DOM
XML Object Mapping
XPath
XQuery

Question 4

Which functions would be needed to translate the following string:

I love PHP 5

to the following?

5 PHP EVOL I

Answers: (choose 2)

mirror()
strtoupper()
toupper()
str_reverse()
strrev()

Question 5

Which two internal PHP interfaces provide functionality which allow you to treat an object like an array?

Answers: (choose 2)

iteration
arrayaccess
objectarray
iterator
array

Question 6

Consider the following code snippet:

$query = "INSERT INTO mytable 
          (myinteger, mydouble, myblob, myvarchar)
          VALUES (?, ?, ?, ?)";
$statement = mysqli_prepare($link, $query);

if(!$statement)
{
  die(mysqli_error($link));
}

/* The variables being bound to by MySQLi
   don't need to exist prior to binding */
mysqli_bind_param($statement, "idbs",
  $myinteger, $mydouble, $myblob, $myvarchar);

/* ???????????? */ 

/* execute the query, using the variables as defined. */

if(!mysqli_execute($statement))
{
  die(mysqli_error($link));
}

Assuming this snippet is a smaller part of a correctly written script, what actions must occur in place of the ????? in the above code snippet to insert a row with the following values: 10, 20.2, foo, string ?

Answer…

A transaction must be begun and the variables must be assigned
Each value must be assigned prior to calling mysqli_bind_param(), and thus nothing should be done
Use mysqli_bind_value() to assign each of the values
Assign $myinteger, $mydouble, $myblob, $myvarchar the proper values

Question 7

Given the string:

$var = "john@php.net";

Which of the following will extract the TLD (top level domain) of ".net" from the string?

Answer...

strstr($var, strpos($var, "."));
substr($var, strpos($var, "@"));
substr($var, strstr($var, "."));
substr($var, strpos($var, ".") 1);
substr($var, strpos($var, "."));

Question 8

The ____ construct is particularly useful to assign your own variable names to values within an array.

Answer...

array_get_variables
current
each
import_variables
list

Question 9

Given the following XML document in a SimpleXML object:

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html
     PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
  <head>
    <title>XML Example</title>
  </head>
  <body>
    <p>
      Moved to <<a href="http://example.org/">http://www.example.org/</a>.>
      <br/>
    </p>
  </body>
</html>

Select the proper statement below which will display the HREF attribute of the anchor tag.

Answer...

$sxe->body->p[0]->a[1]['href']
$sxe->body->p->a->href
$sxe->body->p->a['href']
$sxe['body']['p'][0]['a']['href']
$sxe->body->p[1]->a['href']

Question 10

Consider the following script:

$dom = new DOMDOcument();
$dom->load("myxmlfile.xml");
foreach($dom->documentElement->childNodes as $child)
{
  if(($child->nodeType == XML_ELEMENT_NODE) &&
      $child->nodeName == "item")
  {
    foreach($child->childNodes as $item)
    {
      if(($item->nodeType == XML_ELEMENT_NODE) &&
         ($item->nodeName == "title"))
      {
        print "$item->firstChild->data\n";
      }
    }
  }
}

Assuming the referenced XML document exists and matches the parsing logic, what should be displayed when this script is executed?

Answer...

None of the above
The XML of each 'title' node
The XML of each 'item' node
"Title" for every title node in the document
The contents of every 'title' node which exists under an 'item' node

Question 11

Which of the following is the best way to split a string on the "-=-" pattern?

Answer...

They all are equally proper methods
str_split($string, strpos($string, "-=-"))
preg_split("-=-", $string);
explode("-=-" $string);

Question 12

SimpleXML objects can be created from what types of data sources?

Answers: (choose 3)

A String
An array
A DomDocument object
A URI
A Database resource

Question 13

Which of the following are valid PHP variables?

Answers: (choose 4)

@$foo
&$variable
${0x0}
$variable
$0x0

Question 14

When implementing a permissions system for your Web site, what should always be done with regards to the session?

Answer...

None of the above
You should not implement permission systems using sessions
Sessions should be cleared of all data and re-populated
The session key should be regenerated
The session should be destroyed

Question 15

SQL Injections can be best prevented using which of the following database technologies?

Answers: (choose 1)

All of the above
Prepared Statements
Persistent Connections
Unbuffered Queries
Query escaping

Question 16

When attempting to prevent a cross-site scripting attack, which of the following is most important?

Answer...

Not writing Javascript on the fly using PHP
Filtering Output used in form data
Filtering Output used in database transactions
Writing careful Javascript
Filtering all input

Question 17

What three special methods can be used to perform special logic in the event a particular accessed method or member variable is not found?

Answers: (choose 3)

__get($variable)
__call($method, $params)
__get($method)
__set($variable, $value)
__call($method)

Question 18

When running PHP in a shared host environment, what is the major security concern when it comes to session data?

Answer...

Sessions on shared hosts are easily hijacked by outside malicious users
All of the above
You cannot use a custom data store in shared hosts
Session data stored in the file system can be read by other scripts on the same shared host
Users outside the shared host can access any site which created a session for them

Question 19

A fingerprint of a string can be determined using which of the following?

Answer...

md5()
hash()
fingerprint()
None of the above

Question 20

When embedding PHP into XML documents, what must you ensure is true in order for things to function properly?

Answer...

Disabling of the short_tags PHP.ini directive
Enabling the asp_tags PHP.ini directive
That you have XPath support enabled in PHP 5
That your XML documents are well-formed
None of the above, PHP can be embedded in XML in all cases.

Question 21

What is the output of the following code?

$string = "111221";
for($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;

Answer...

312211
3312212
11221221
221131
3211122

Question 22

When working with a database, which of the following can be used to mitigate the possibility of exposing your database credientials to a malicious user?

Answers: (choose 3)

Moving all database credentials into a single file
Moving all database credentials outside of the document root
Restricting access to files not designed to be executed independently
Setting creditial information as system environment variables
Using PHP constants instead of variables to store credentials

Question 23

Consider the following code:

session_start();
if(!empty($_REQUEST['id'])
   && !empty($_REQUEST['quantity'])) {
  $id = scrub_id($_REQUEST['id']);
  $quantity = scrub_quantity($_REQUEST['quantity'])
  $_SESSION['cart'][] = array('id' => $id,
                              'quantity' => $quantity)
}
/* .... */

What potential security hole would this code snippet produce?

Answer...

Cross-Site Scripting Attack
There is no security hole in this code
Code Injection
SQL Injection
Cross-Site Request Forgery

Question 24

Which statement will return the third parameter passed to a function?

Answer...

$argv[3];
$argv[2];
funcgetargs(3);
funcgetarg(2);
funcgetarg(3);

Question 25

When is it important to validate data coming from an HTML form?

Answer...

Only when the fields are required
Only when accepting file uploads
Everywhere, except cookies
Only when accepting forms using an input type of text or a <textarea> field
None of the above

Question 26

Which of the following extensions are no longer part of PHP 5 and have been moved to PECL?

Answers: (choose 2)

tidy
mysql
w32api
curl
dio

Question 27

The following is a common XML structure used in service oriented architectures, what does it represent?

<?xml version="1.0"?>
<methodCall>
 <methodName>myMethod</methodName>
 <params>
  <param>
   <value><string>HI!</string></value>
  </param>
 </params>
</methodCall>

Answer...

None of the above
A fragment of a complete SOAP request
XML-RPC
REST
SOAP

Question 28

Which of the following functions could be used to break a string into an array?

Answers: (choose 3)

array_split()
split()
string_split()
preg_match_all()
explode()

Question 29

Which PCRE regular expression will match the string PhP5-rocks?

Answer...

/^[hp1-5]*\-.*/i
/[hp1-5]*\-.?/
/[hp][1-5]*\-.*/
/[PhP]{3}[1-5]{2,3}\-.*$/
/[a-z1-5\-]*/

Seite:

Some ZCE Mock Exam Questions

Kommentare

Kommentare werden geladen...

Some ZCE Mock Exam Questions

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Ähnliche Artikel

Kommentare