Zend 200-550 Online Practice Questions and Exam Preparation

Zend 200-550 Online Questions & Answers

• Question 71:

  Which of the following statements about Reflection is correct?

  A. Reflection is an extension that can be disabled
  B. Reflection is a new extension present only in PHP 5.3+
  C. Reflection only allows to reflect on built-in classes
  D. Built-in classes can be reflected on command line using php --rc
  D. Built-in classes can be reflected on command line using php --rc

• Question 72:

  Which of the following is NOT a valid function declaration?

  A. function x ($x1 = array())
  B. function x (A $x1)
  C. function x (A $x1 = null)
  D. function x ($x1 = $x2)
  D. function x ($x1 = $x2)

• Question 73:

  Assuming UTF-8 encoding, what is the value of $count? $count = strlen($data);

  B. 4
  C. 5
  D. 7
  C. 5

• Question 74:

  What is the output of the following code?

  class a

  {

  public $val;

  }

  function renderVal (a $a)

  {

  if ($a) {

  echo $a->val;

  }

  }

  renderVal (null);

  A. A syntax error in the function declaration line
  B. An error, because null is not an instance of 'a'
  C. Nothing, because a null value is being passed to renderVal()
  D. NULL
  B. An error, because null is not an instance of 'a'

• Question 75:

  What will the following function call print? printf('%010.6f', 22);

  A. 22
  B. 22.00
  C. 022.000000
  D. 22.000000
  C. 022.000000

• Question 76:

  What is the output of the following code?

  class Base {

  protected static function whoami() {

  echo "Base ";

  }

  public static function whoareyou() {

  static::whoami();

  }

  }

  class A extends Base {

  public static function test() {

  Base::whoareyou();

  self::whoareyou();

  parent::whoareyou();

  A. :whoareyou();static::whoareyou();}public static function whoami() {echo "A ";}}class B extends A {public static function whoami() {echo "B ";}}
  B. :test();
  C. B B B B B
  D. Base A Base A B
  E. Base B B A B
  F. Base B A A B
  C. B B B B B

• Question 77:

  Is the following code vulnerable to SQL Injection ($mysqli is an instance of the MySQLi class)?

  $age = $mysqli->real_escape_string($_GET['age']);

  $name = $mysqli->real_escape_string($_GET['name']);

  $query = "SELECT * FROM `table` WHERE name LIKE '$name' AND age = $age"; $results = $mysqli- >query($query);

  A. No, the code is fully protected from SQL Injection.
  B. Yes, because the $name variable is improperly escaped.
  C. Yes, because the $name variable and the $age variable is improperly escaped.
  D. Yes, because the $age variable is improperly escaped.
  E. Yes, because you cannot prevent SQL Injection when using MySQLi
  D. Yes, because the $age variable is improperly escaped.

• Question 78:

  Which interfaces could class C implement in order to allow each statement in the following code to work? (Choose 2)

  $obj = new C();

  foreach ($obj as $x => $y) {

  echo $x, $y;

  }

  A. Iterator
  B. ArrayAccess
  C. IteratorAggregate
  D. ArrayObject
  A. Iterator
  C. IteratorAggregate

• Question 79:

  The following form is loaded in a browser and submitted, with the checkbox activated:

  In the server-side PHP code to deal with the form data, what is the value of $_POST['accept'] ?

  A. accept
  B. ok
  C. true
  D. on
  D. on

• Question 80:

  Which PHP function retrieves a list of HTTP headers that have been sent as part of the HTTP response or are ready to be sent?

  A. header()
  B. headers()
  C. headers_list()
  D. headers_sent()
  E. getresponseheaders()
  C. headers_list()