Zend Zend Certifications 200-710 Questions & Answers

• Question 111:

  What is the output of the following code?

  function z($x) {

  return function ($y) use ($x) {

  return str_repeat($y, $x);

  };

  }

  $a = z(2);

  $b = z(3);

  echo $a(3) . $b(2);

  A. 22333

  B. 33222

  C. 33322

  D. 222333

  Correct Answer: B

• Question 112:

  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 113:

  Which of the following tasks can be achieved by using magic methods? (Choose 3)

  A. Initializing or uninitializing object data

  B. Creating a new stream wrapper

  C. Creating an iterable object

  D. Processing access to undefined methods or properties

  E. Overloading operators like +, *, etc.

  F. Converting objects to string representation

  Correct Answer: ADF

• Question 114:

  Which of the following statements is correct?

  A. Interfaces can extend only one interface

  B. Interfaces can extend more than one interface

  C. Interfaces can inherit a method from different interfaces

  D. Interfaces can redeclare inherited methods

  Correct Answer: B

• Question 115:

  What is the output of the following code? var_dump(boolval([]));

  A. bool(true)

  B. bool(false)

  Correct Answer: B

• Question 116:

  What is the output of the following code? var_dump(boolval(new StdClass()));

  A. bool(true)

  B. bool(false)

  Correct Answer: A

• Question 117:

  You want to parse a URL into its single parts. Which function do you choose?

  A. parse_url()

  B. url_parse()

  C. get_url_parts()

  D. geturlparts()

  Correct Answer: A

• Question 118:

  What is the output of the following code? echo '1' . (print '2') + 3;

  A. 123

  B. 213

  C. 142

  D. 214

  E. Syntax error

  Correct Answer: D

• Question 119:

  Consider the following two files. When you run test.php, what would the output look like?

  test.php:

  include "MyString.php";

  print ",";

  print strlen("Hello world!");

  MyString.php:

  namespace MyFramework\String;

  function strlen($str)

  {

  return \strlen($str)*2; // return double the string length

  }

  print strlen("Hello world!")

  A. 12,12

  B. 12,24

  C. 24,12

  D. 24,24

  E. PHP Fatal error: Cannot redeclare strlen()

  Correct Answer: C

• Question 120:

  What is the output of the following code?

  class A {

  public $a = 1;

  public function __construct($a) { $this->a = $a; }

  public function mul() {

  return function($x) {

  return $this->a*$x;

  };

  }

  }

  $a = new A(2);

  $a->mul = function($x) {

  return $x*$x;

  };

  $m = $a->mul();

  echo $m(3);

  A. 9

  B. 6

  C. 0

  D. 3

  Correct Answer: B