Zend Zend Certifications 200-710 Questions & Answers

• Question 21:

  What SimpleXML function is used to parse a file?

  A. simplexml_load_file()

  B. simplexml_load_string()

  C. load()

  D. loadFile()

  E. loadXML()

  F. None of the above.

  Correct Answer: A

• Question 22:

  What content-type is required when sending an HTTP POST using JavaScript to ensure that PHP can access the data?

  A. application/x-www-form-urlencoded

  B. http/post

  C. text/html

  D. object/multipart-formdata

  Correct Answer: A

• Question 23:

  In order to create an object storage where each object would be stored only once, you may use which of the following? (Choose 2)

  A. SplFixedArray

  B. SplObjectStorage

  C. SplString

  D. spl_object_hash

  E. spl_same_object

  Correct Answer: BD

• Question 24:

  What is the output of the following code? $f = function () { return "hello"; }; echo gettype($f);

  A. hello

  B. string

  C. object

  D. function

  Correct Answer: C

• Question 25:

  Given the following DateTime object, which sample will NOT alter the date to the value '2014-02-15'? $date = new DateTime('2014-03-15');

  A. $date->sub(new DateInterval('P1M'));

  B. $date->setDate(2014, 2, 15);

  C. $date->modify('-1 month');

  D. $date->diff(new DateInterval('-P1M'));

  Correct Answer: D

• Question 26:

  Given the following code, what will the output be:

  trait MyTrait {

  private $abc = 1;

  public function increment() {

  $this->abc++;

  }

  public function getValue() {

  return $this->abc;

  }

  }

  class MyClass {

  use MyTrait;

  public function incrementBy2() {

  $this->increment();

  $this->abc++;

  }

  }

  $c = new MyClass;

  $c->incrementBy2();

  var_dump($c->getValue());

  A. Fatal error: Access to private variable MyTrait::$abc from context MyClass

  B. Notice: Undefined property MyClass::$abc

  C. int(2)

  D. int(3)

  E. NULL

  Correct Answer: D

• Question 27:

  You'd like to use the class MyDBConnection that's defined in the MyGreatFramework \MyGreatDatabaseAbstractionLayer namespace, but you want to minimize *as much as possible* the length of the class name you have to type. What would you do?

  A. Import the MyGreatFramework namespace

  B. Import the MyGreatFramework\MyGreatDatabaseAbstractionLayer namespace

  C. Alias MyGreatFramework\MyGreatDatabaseAbstractionLayer\MyDBConnection to a shorter name

  D. Alias MyGreatFramework\MyGreatDatabaseAbstractionLayer to a shorter name

  Correct Answer: C

• Question 28:

  Consider 3 PHP files that are called asynchronously via XmlHttpRequest: Which of the following statements is true? (Choose two.)

  

  A. The total execution time for all 3 requests will be the maximum of the longest sleep() call

  B. The requests may be processed out of order

  C. The requests are guaranteed to be executed in order

  D. Concurrent requests will be blocked until the session lock is released

  Correct Answer: A

• Question 29:

  What is the benefit of using persistent database connections in PHP? (Choose two.)

  A. Reduces the connection and authentication overhead of connecting to the database

  B. Ensures that only a single connection is open to the database from PHP

  C. Allows connection settings such as character set encoding to persist

  D. Allows for resumption of transactions across multiple requests.

  Correct Answer: CD

• Question 30:

  In the following code, which classes can be instantiated?

  abstract class Graphics {

  abstract function draw($im, $col);

  }

  abstract class Point1 extends Graphics {

  public $x, $y;

  function __construct($x, $y) {

  $this->x = $x;

  $this->y = $y;

  }

  function draw($im, $col) {

  ImageSetPixel($im, $this->x, $this->y, $col);

  }

  }

  class Point2 extends Point1 { }

  abstract class Point3 extends Point2 { }

  A. Graphics

  B. Point1

  C. Point2

  D. Point3

  E. None, the code is invalid

  Correct Answer: C