EXAM OF SPRING 2014

Part 1 of 1 - Inline Text

All methods in an interface must be abstract methods.

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All methods in an abstract class must be declared as abstract methods.

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PHP does not allow multiple inheritance.

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PHP does not allow constructor overriding.

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Given a class named Person:

class Person {

   private $name;

   public function __construct($name) {

        $this->name = $name;

   }

}

Which of the following creates an object from the Person class?

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Which of the following is NOT true regarding a PHP class constructor?

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Which of the following creates a default constructor for the class called Animal?

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In OOP, class data are usually private so access to class data is restricted. This design practice is called _______.

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The template or blueprint that defines abstract characteristics of all real world objects of the same kind is called a(n) ______ in OOP.

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In OOP, the practice of deriving new classes from existing classes is called __________.

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Which of the following statement is NOT true?

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The public methods of a class are also known as the class's _____.

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Given a class method named myMethod:

class A {

     ____ function myMethod {

          //code omitted

     }

}

If you don't want the method to be overridden, what keyword should be used in the blank?

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Given classes named Parent and Child:



class Parent {

    public function aMethod($name) { 

        //code omitted

    }

}



class Child extends Parent {

    //insert a method here

}



Which of the following methods in class Child overrides the method aMethod defined in class Parent?

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Which of the following is NOT a valid PHP visibility modifier?

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In OOP, composition is sometimes referred to as a(n) ______ relationship.

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A _____ variable represents classwide information that is shared by all the objects of the class.

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Given an OOP interface:

interface Shape {

  public function getArea();

  public function getName();

}



class A ______ Shape {

  //code omitted

}



What should be inserted into the blank in class A?

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Given a class named Person:

class Person {

    private $name;

    private static $count;



    public function __construct($theName) {

        ______ = $theName;

        //other code omitted

    }

}



What should be inserted into the blank?

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Given a class named Person:

class Person {

    private $name;

    private static $count;



    public function __construct($name) {

        _________ 

        //other code omitted

    }

}



What should be inserted into the blank so that the variable $count increments by 1 everytime a Person object is created?

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A is-a relationship is implemented via __________.

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Polymorphism is one of the three major OOP principles. It means ______________.

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Composition means ______________.

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In a UML class diagram, the symbol "+" or "-" before a member name specifies accessibility of the member. "-" indicates that the member is [removed] . 

In OOP, _________ can be used to provide functionality to be inherited by related or unrelated classes.

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Which of the following statements is true?

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What keyword can be used to reference a method defined in the superclass from a subclass?

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In an UML class diagram, inheritance relationship between a parent class and its child class is graphically shown with the arrow pointing to the [removed] class. 

Given a class diagram below:

Note: the three circles and the numbers next to them are not part of the class diagram.



Object oriented programming supports three types of class relationship:composition, inheritance, and interface. Identify the three types of class relationship in the above diagram. The symbol in Circle 1 indicates[removed] relationship; the symbol in Circle 2 indicates [removed] relationship; and the symbol in Circle 3 indicates [removed]relationship.

People often refer to an object in OOP programing as a black box. Explain your understanding of this analogy.

(Maximum number of characters: 60000)

Given a JavaScript function named search:

      function search()  { //code omitted }

The following is the HTML code for a textbox: 

       <input id="keyword" [removed]  > 

The event handler for handling key release is onkeyup. What code should be filled in the blank above so that when a key is released in the textbox, the search function will be invoked? 

Given an XML document segment:

<year>2011</year>

The type of the node that contains the string value "2011" is ______.

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This question refers to an XML document named book.xml. Click here to display the document. 

Given a JavaScript variable named xmlDoc which refers to the XML document book.xml. Which of the following answers can you use to retrieve the the author of the second book, whose id is "bk102"?

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One way a web server responds to an asynchronous AJAX request is sending an XML document back to the client. To extract the XML document, you may use the ________ property of the XMLHttpRequest object. .

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Given an XMLHttpRequest object named xmlHttp. Which of the following is the correct code for defining an asynchronous AJAX request?

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The readyState property of the XMLHttpRequest object indicates the current state of the object. The event handler that can be used to monitor status changes of the object is[removed] .