Zend Zend Certifications 200-550 Questions & Answers

• Question 91:

  Which of the following is correct? (Choose 2)

  A. A class can extend more than one class.

  B. A class can implement more than one class.

  C. A class can extend more than one interface.

  D. A class can implement more than one interface.

  E. An interface can extend more than one interface.

  F. An interface can implement more than one interface.

  Correct Answer: DE

• Question 92:

  Which of the following statements about PHP is false? (Choose 2)

  A. A final class can be derived.

  B. A final class may be instantiated.

  C. A class with a final function may be derived.

  D. Static functions can be final.

  E. Properties can be final.

  Correct Answer: AE

• Question 93:

  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

• Question 94:

  Which of the following code snippets is correct? (Choose 2)

  A. interface Drawable {abstract function draw();}

  B. interface Point {function getX();function getY();}

  C. interface Line extends Point {function getX2();function getY2();}

  D. interface Circle implements Point {function getRadius();}

  Correct Answer: BC

• Question 95:

  Type hinting in PHP allows the identification of the following variable types: (Choose 2)

  A. String

  B. Integer

  C. Array

  D. Any class or interface type

  E. All of the above

  Correct Answer: CD

• Question 96:

  What is the name of the PHP function used to automatically load non-yet defined classes?

  A. autoload()

  B. __autoload()

  C. __catch()

  D. load()

  E. loadClass()

  Correct Answer: B

• Question 97:

  When a class is defined as final it:

  A. Can no longer be extended by other classes.

  B. Means methods in the class are not over-loadable.

  C. Cannot be defined as such, final is only applicable to object methods.

  D. Cannot be instantiated.

  Correct Answer: A

• Question 98:

  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

  Correct Answer: D

• Question 99:

  What is the name of the method that can be used to provide read access to virtual properties in a class?

  A. __call()

  B. __get()

  C. __set()

  D. __wakeup()

  E. __fetch()

  Correct Answer: B

• Question 100:

  Which of the following is NOT possible using reflection?

  A. Analysing of nearly any aspect of classes and interfaces

  B. Analysing of nearly any aspect of functions

  C. Adding class methods

  D. Implement dynamic construction (new with variable class name)

  Correct Answer: C