Zend Zend Certifications 200-550 Questions & Answers

• Question 141:

  Consider the following code. What can be said about the call to file_get_contents?

  $getdata = "foo=bar";

  $opts = array('http' =>

  array(

  'method' => 'POST',

  'header' => 'Content-type: application/x-www-form-urlencoded', 'content' => $getdata

  )

  );

  $context = stream_context_create($opts);

  $result = file_get_contents('http://example.com/submit.php', false, $context);

  A. A GET request will be performed on http://example.com/submit.php

  B. A POST request will be performed on http://example.com/submit.php

  C. An error will be displayed

  Correct Answer: B

• Question 142:

  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)

  Correct Answer: D

• Question 143:

  Which of the following is true about stream contexts? (Choose 2)

  A. A context can modify or enhance the behavior of a stream

  B. A context indicates what session the stream is part of

  C. A context is a set of parameters and stream wrapper specific options

  D. Contexts are created with new Stream_Context();

  Correct Answer: AC

• Question 144:

  What is the output of the following code?

  function fibonacci (and$x1 = 0, and$x2 = 1)

  {

  $result = $x1 + $x2;

  $x1 = $x2;

  $x2 = $result;

  return $result;

  }

  for ($i = 0; $i < 10; $i++) {

  echo fibonacci() . ',';

  }

  A. An error

  B. 1,1,1,1,1,1,1,1,1,1,

  C. 1,1,2,3,5,8,13,21,34,55,

  D. Nothing

  Correct Answer: B

• Question 145:

  What is the output of the following code?

  function ratio ($x1 = 10, $x2)

  {

  if (isset ($x2)) {

  return $x2 / $x1;

  }

  }

  echo ratio (0);

  A. 0

  B. An integer overflow error

  C. A warning, because $x1 is not set

  D. A warning, because $x2 is not set

  E. A floating-point overflow error

  F. Nothing

  Correct Answer: D

• Question 146:

  What will the $array array contain at the end of this script?

  function modifyArray (and$array)

  {

  foreach ($array as and$value)

  {

  $value = $value + 1;

  }

  $value = $value + 2;

  }

  $array = array (1, 2, 3);

  modifyArray($array);

  A. 2, 3, 4

  B. 2, 3, 6

  C. 4, 5, 6

  D. 1, 2, 3

  Correct Answer: B

• Question 147:

  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

  Correct Answer: B

• Question 148:

  How do you allow the caller to submit a variable number of arguments to a function?

  A. Using a prototype like function test(... $parameters).

  B. Using a prototype like function test() and the function func_get_args() inside the function body.

  C. Using a prototype like function test($parameters[]).

  D. Using a prototype like function test() and the function get_variable_args() inside the function body.

  E. This is not possible in PHP.

  Correct Answer: B

• Question 149:

  How many times will the function counter() be executed in the following code?

  function counter($start, and$stop)

  {

  if ($stop > $start)

  {

  return;

  }

  counter($start--, ++$stop);

  }

  $start = 5;

  $stop = 2;

  counter($start, $stop);

  A. 3

  B. 4

  C. 5

  D. 6

  Correct Answer: C

• Question 150:

  What is the output of the following code?

  function append($str)

  {

  $str = $str.'append';

  }

  function prepend(and$str)

  {

  $str = 'prepend'.$str;

  }

  $string = 'zce';

  append(prepend($string));

  echo $string;

  A. zceappend

  B. prependzceappend

  C. prependzce

  D. zce

  Correct Answer: C